3rd Person POV
The secret platform beneath Kuoh Town's train station looked like any abandoned underground spur—dim fluorescent lights flickering overhead, cracked tiles underfoot, faint echoes of dripping water somewhere in the dark—but the moment the Gremory clan crest glowed faintly on the far wall, the illusion shattered.
A low rumble rolled through the tracks. No wind. No announcement. Just the sudden, unmistakable presence of something ancient and alive.
The train emerged from the tunnel like a shadow given form—sleek black cars edged in crimson and gold, windows tinted so dark they reflected the platform like mirrors. The locomotive bore the Gremory sigil on its prow: a stylized lion rampant, mane made of living flame that burned without heat. No smoke. No steam. Just pure, contained demonic power.
An old man in a crisp black uniform stepped down from the lead car the instant the train stopped. White hair, immaculate posture, eyes sharp enough to cut glass despite the gentle smile. The ticket inspector—known simply as "Old Man Haru" to the passengers—bowed deeply. "Lady Rias. Lady Sona. Honored guests. Welcome aboard the Crimson Line."
His gaze swept the group—lingering a fraction longer on the three humans standing among the devils.
Arto—casual linen shirt open at the collar, sleeves rolled to the elbows, sunglasses perched on his head—stood with hands in pockets, posture relaxed but unmistakably alert. Nami—flowy white sundress, oversized sun hat, designer sunglasses pushed up into her hair—already had her phone out, snapping discreet photos of the train's crest for "reference material." Robin—simple black sundress with long slits up the sides, wide-brimmed hat casting shadows across her face—carried herself with the quiet poise of someone who had seen far older trains than this one.
Haru's eyes twinkled—old amusement, older respect. "New faces," he said warmly. "Three humans of great importance to the clan. The Gremory Crest recognizes you. The Line recognizes you. Welcome home." He stepped aside with another bow, gesturing toward the open doors.
Rias went first—summer dress fluttering in the faint underground breeze—then reached back to take Arto's hand. Akeno followed, linking arms with him on the other side. Nami bounced up the steps next, already peering into the cars like she was appraising real estate. Robin glided in last—silent, graceful, eyes cataloguing every detail.
Sona's peerage filed in behind them—Sona herself in a light blue sundress, Tsubaki in white linen, the rest in various summer outfits that still somehow managed to look elegant. Inside, the train was everything the exterior promised: opulent, timeless, demonic.
Deep crimson velvet seats, gold filigree along the walls, crystal chandeliers that glowed with soft, sourceless light. Windows showed not the tunnel walls but rolling vistas of the Underworld—crimson skies, black mountains, rivers of liquid fire—all perfectly framed like paintings. A dining car waited at the far end, already set with chilled drinks and light appetizers.
Haru followed them aboard last, tipping his cap. "Journey time to the Gremory estate: approximately four hours by mortal clock. We will pass through Sitri territory midway—Lady Sona, your family crest has already cleared the way. Refreshments are served continuously. Private compartments are assigned. If you require anything at all…"
He bowed once more. "…the Line remembers its masters and mistresses." The doors sealed with a soft pneumatic sigh. The train began to move—smooth, silent, almost imperceptibly at first—then faster, faster, until the windows blurred into streaks of crimson and gold. Rias leaned against Arto's shoulder—looking out at the shifting Underworld landscape. "First time on the family train?" she asked softly.
Arto nodded—once—still taking it all in. "First time on any devil train." Akeno pressed closer on his other side—smiling against his neck. "Welcome to the VIP carriage, darling. No turning back now."
Nami—already in the dining car ahead—called back over her shoulder. "First round of Underworld cocktails on me! Non-alcoholic versions for the kids!"
Sona sighed fondly—already steering Tsubaki toward a quieter compartment. "Try not to bankrupt the bar before we reach the estate."
The Crimson Line glided deeper into the Underworld with that eerie, frictionless smoothness—no clatter of wheels, no sway, just a low, almost inaudible thrum of demonic power. Outside the windows, the scenery shifted from Kuoh's mundane tunnel walls to sweeping vistas of crimson skies and jagged obsidian peaks, the colors so vivid they looked painted on glass.
Inside the private compartment—plush crimson velvet seats, gold filigree accents, a low table already set with chilled Underworld fruits and sparkling water—everyone had claimed their spots.
Arto sat near the window, phone in hand, thumb moving across the screen with deliberate slowness. Akeno mirrored him on the opposite bench—her own burner phone open to the same anonymous chat app, though her expression was softer, more thoughtful as she typed a quick reply to Elias.
Rias—laptop balanced on her knees—kept refreshing her inbox every few seconds, the faint click-click of the trackpad the only sound breaking the gentle hum of the train.
Robin—seated beside Nami—watched Rias with quiet amusement, then giggled softly. "The Institute won't answer that soon, dear," she said, voice warm but teasing. "It usually takes a few weeks for the first questioning letter—or invitation—to arrive. They're thorough. Brutally thorough. You'll get polite, razor-sharp dissection from scholars who've spent centuries arguing over sigil harmonics. Relax. Breathe. Enjoy the scenery."
Nami—legs crossed, tablet in lap—leaned over Robin's shoulder to peek at Rias's screen.
"That's right, lil' sis," she added cheerfully. "They're smart, not fast. They've got literal centuries of submissions to slog through before they reach your masterpiece. So stop doom-scrolling your inbox and worry about how to relax instead. We've got a month of vacation ahead—beaches, hot springs, Underworld banquets. You can obsess over peer-review emails later."
Rias exhaled—fingers finally relaxing on the trackpad. She scrolled once more through the endless list of unread messages… then paused. Her eyes lit up. "Found it." She turned the laptop slightly toward Arto. "Have you received the invitation mail? Sirzechs-nii-sama registered your seat as a noble in the coming summit where Grayfia's fate is decided…"
She leaned closer—trying (and failing) to peek at his phone screen. "Who are you texting?" Arto's lips curved into a small, almost boyish smile. "Grayfia, of course."
He tilted the phone just enough for her to see the contact name at the top: Grayfia Lucifuge
Below it, the chat was already active—his first message sent that morning.
Arasto Atreides: Good morning, Lady Grayfia. Sirzechs Lucifer suggested we speak before the summit. I'd prefer to hear your thoughts directly—without intermediaries or agendas. If you're willing, I'm available whenever suits you. —Arasto Atreides
"Arasto Atreides?" she managed between giggles, pressing a hand to her mouth. "Seriously? You're walking into a summit of the oldest pure-blood houses in the Underworld with the name of a fictional desert messiah from a 20th-century human sci-fi novel?"
Arto shrugged—completely unrepentant—thumbs still moving across the screen as he typed. "First: it's a good book. Second: the initials match. Third: no one in the Underworld has read Dune. They'll hear 'Atreides' and think it's some obscure minor house from a forgotten ring. Fourth…" He glanced up at her, smirk widening. "I like the irony. The man who's about to potentially derail the biggest political breeding scheme in centuries… named after a guy who accidentally started a holy war by being too competent."
Akeno—still texting Elias—peeked over with a delighted grin. "I like it. Arasto Atreides sounds mysterious. Powerful. Sexy. Very 'man with a tragic past who's about to ruin everyone's day' energy." Nami snorted from her seat. "Bold choice. But if you're going full desert messiah, at least commit. Wear the stillsuit. Ride a sandworm. Full method acting."
Arto shrugged—still smiling faintly at his phone as Grayfia's three-dot typing bubble appeared… then vanished… then appeared again. And while he waits, Arto stood in the center of the private compartment, arms slightly spread as he turned slowly—first left, then right—letting the crimson-and-gold crest catch the warm overhead lights of the train car.
The tuxedo was immaculate: midnight black wool, single-breasted, perfectly tailored to his broad shoulders and narrow waist. The lapels shimmered with faint silver threading that echoed the Stabilizer tattoo hidden beneath. On the left breast sat the newly fabricated noble crest Sirzechs had delivered that morning—a stylized silver abyssal spiral encircled by a thin ring of crimson flame, simple enough to look ancient and unpretentious, striking enough to demand attention without screaming for it.
And then there was the mask.
Jet black, matte finish, covering his entire face from forehead to chin. No eye holes—only two narrow, angled slits that revealed nothing of the eyes beneath but still allowed perfect vision (a subtle enchantment Robin had woven into the fabric earlier that week). The mask had no mouth opening either—just smooth, featureless obsidian curves that gave the unsettling impression of a void wearing formalwear. It wasn't ornate. It wasn't gaudy. It was simply… wrong in the most arresting way possible.
He completed one final turn—then stopped, hands sliding into his pockets, head tilting slightly as though listening for judgment. "What do you think, ladies?" His voice came out changed—deeper, rougher at the edges, with a metallic undertone that made it sound like it was being spoken through cold steel. Not a full distortion spell—just enough to make it unrecognizable to anyone who'd only ever heard "Arto" speak normally. "Enough to stir the meeting hall… and lead an army of fanatics?"
For three full seconds, the compartment was dead silent. Then Akeno let out a low, delighted whistle—slowly rising from her seat, eyes raking him from boots to masked face like she was appraising a new weapon. "Darling…" she purred, stepping close enough to trail one finger down the center of his chest, right along the hidden line of the Stabilizer tattoo. "You look like the final boss of every nightmare I've ever wanted to have. Dangerous. Mysterious. Utterly fuckable."
Rias—still seated—crossed her legs slowly, chin resting on laced fingers, lips curving into a slow, appreciative smile. "You're going to make half the elders faint from sheer intimidation," she said, voice warm with pride. "The other half will immediately start scheming how to either recruit you… or eliminate you. Either way—they won't be thinking about Grayfia-sama's marriage prospects. They'll be thinking about you."
Nami—perched on the arm of a chair—grinned wide enough to show teeth. "Ten out of ten. Menace aesthetic on point. The mask is chef's kiss. They'll spend the first ten minutes trying to figure out whether you're a new Satan, a rogue fallen, or some eldritch horror Sirzechs summoned for dramatic effect. By the time they realize you're 'just' a noble… they'll already be sweating."
Robin—leaning against the compartment door—tilted her head, studying him with quiet, professional approval. "The crest is subtle but unmistakable. The mask eliminates facial recognition and voiceprint analysis. Combined with the altered cadence you're using… no one who's only met you casually will connect the dots. Even those who've seen you fight won't place you immediately. You've become a blank slate they can project whatever fear or ambition they want onto."
She smiled—small, fond. "Stirring the hall? Darling… you're going to own it." Arto exhaled through his nose—a short, amused huff that still came out sounding slightly metallic through the mask. "Good. but should I use Stabilizer to spike my mana up to state my point without being laughed at? Or keep myself underestimated until the real fight begins? Or maintain something in the middle?" He turns to Robin "My dear strategist?"
Robin tilted her head slightly, studying the masked figure before her with the same cool, calculating gaze she once used to map enemy supply lines or predict political assassinations.
She stepped away from the doorframe—slow, deliberate—circling him once like a sculptor assessing her own work. The soft metallic echo of Arto's altered voice still lingered in the compartment air.
"Spiking your mana with the Stabilizer right at the entrance would be dramatic," she began, voice low and measured. "Instant respect. Instant fear. The elders would feel the pressure wave before they even saw the crest. You'd walk in as a walking cataclysm—someone they cannot ignore, cannot dismiss as a minor noble playing dress-up. The room would hush. They'd lean forward. They'd listen."
She paused behind him—close enough that he could feel the faint warmth of her presence. "But it would also paint a target on your back from the first second. Every schemer in that hall would immediately start calculating: 'How do we counter him? How do we bind him? How do we use him?' You'd lose the element of surprise. You'd lose the ability to watch them underestimate you while you map their alliances, their tells, their weaknesses. You'd become the obvious threat instead of the unknown variable."
She completed the circle—stopping in front of him again, arms loosely folded. "Keeping yourself underestimated until the moment you strike… that's the classic Legion play. Let them sneer at the masked newcomer. Let them whisper 'who does this Atreides think he is?' Let them relax. Then—when the conversation turns to Grayfia, when Razer Phenex or one of his proxies starts pressing—then you release just enough mana to remind them what kind of sword they're trying to hand to a woman who doesn't want it. Not a full spike. Just a controlled pulse. Enough to make the chandeliers flicker. Enough to make the elders remember why the Abyss feared the Legion in the first place."
Her smile turned faintly wicked. "But the middle path… that's usually the sharpest blade. Maintain a low, steady mana signature—enough to register as 'respectable noble,' not enough to scream 'existential threat.' Let them feel the depth without seeing the bottom. Let them wonder. Let them probe. Let them reveal themselves while you stay opaque. When the moment comes to push—when someone crosses the line with Grayfia—you turn the dial. One notch. Then another. Let them feel the pressure build gradually, inexorably, until they realize too late that the polite stranger in the mask has been holding back the entire time."
She reached up—adjusted the edge of his mask where it met his jaw, a small, almost intimate gesture. "Underestimate until you can't afford to anymore. Then show them exactly why the Abyss still whispers your Legion's name in the dark. Not with a spike that announces you… but with a slow, deliberate turn of the screw that makes them beg you to stop."
Robin stepped back—hands returning to her sides. "That's my recommendation, darling. The middle path. Control the tempo. Let them dance to your rhythm… until you decide the music stops."
Arto exhaled slowly as the mask and tuxedo dissolved in a faint shimmer of silver-blue mana—gone as if they'd never existed, leaving him in the familiar comfort of loose black pants and a simple gray shirt. He dropped onto the bench seat beside Rias and Akeno, the compartment's soft lighting turning his skin warm gold.
The phone was already in his hand again. Grayfia's last reply still glowed on the screen:
Grayfia Lucifuge (14:22): Arasto Atreides...A bold choice of pseudonym...I've read Dune...I know the name carries weight… and irony...My brother-in-law does not hand out contact information lightly, nor does he invent new noble houses without purpose...So I will not pretend this is a casual introduction..I will not pretend I do not understand why you are here. …Thank you. For being willing to step into that room at all.
He stared at the words for several seconds—thumb hovering—then typed with deliberate care.
Arasto Atreides (14:25): You're welcome...But I'm not here to be thanked...I'm here because someone I care about asked me to listen...Not to speak for you. Not to decide for you. Just… to make sure you have a voice that isn't drowned out by everyone else's expectations.
Akeno's phone buzzed once—soft, almost shy—while she was still nestled against Arto's chest, rereading Elias's latest message with a small, private smile.
Before she could reply, Rias's phone lit up in her own hand. She glanced at the screen, eyes widening for half a second, then flicked over to Akeno with a conspiratorial glint.
Akeno caught the look instantly. Her brows rose. Rias tilted her phone just enough for Akeno to see the text she'd just sent:
Rias → Akeno Watch him text Grayfia. Right now. Lover's privilege. We get front-row seats to our man being disgustingly wholesome. Come closer~ 🩷
Akeno's violet eyes sparkled with sudden mischief. She tucked her own phone away, shifted silently, and slid up Arto's side until her cheek rested against his shoulder—close enough to read every word on his screen without breathing too loudly.
Rias mirrored her on the opposite side—chin hooked over Arto's other shoulder, crimson hair spilling across his collarbone like a living curtain. Arto—already mid-reply to Grayfia—didn't flinch. Didn't tense. Didn't even pause typing. He simply tilted the phone slightly toward the center so both women could see clearly.
Rias whispered against his ear—teasing, delighted: "You're so easy to boss around when we do it together." Arto huffed a quiet laugh—still typing. "Only when you do it together." The current chat thread glowed softly between them.
Arasto Atreides (14:47): I've always liked stories that ask hard questions without giving easy answers. Dune does that better than most. The messiah trap. The ecology of power. The way even the "hero" can become the villain if the system stays the same. What about you? Do you read much?
Grayfia Lucifuge (14:49): More than most people assume. I prefer stories where the characters are allowed to be flawed without being punished for it endlessly. Dune is… uncomfortably honest about that. Paul becomes what he was warned against. Leto II takes it even further. And yet the story never says they were wrong. Only that they were inevitable.
Arasto Atreides (14:51): Exactly. It doesn't preach. It just shows the cost. And the cost keeps rising. No clean redemption. No easy victory. Just people trying to steer something too big to control… and failing in ways that still matter.
Grayfia Lucifuge (14:54): Failing in ways that still matter. I like that phrasing. It feels… accurate.
Rias made a tiny, involuntary sound—half sigh, half squeak—and pressed her face harder into Arto's shoulder. Akeno bit her lower lip to keep from laughing out loud. Arto kept typing—completely unruffled.
Arasto Atreides (14:56): There's a line in Children of Dune I've never forgotten. Leto says something like: "The surest sign that an aristocracy exists is the discovery of barriers against change, curtains of iron or steel or stone or any substance that keeps the people in a state of ignorance." That always stuck with me. Power doesn't just protect itself. It builds walls around what people are allowed to know. Around what they're allowed to be.
Grayfia Lucifuge (15:01): …Yes. It does. Sometimes the walls are polite. Sometimes they are gilded. Sometimes they are called "duty." But they are still walls.
Arto paused—thumb hovering—then added one more line.
Arasto Atreides (15:02): Walls can be climbed. Or broken. Or simply walked around. If someone wants to badly enough.
Rias let out a soft, strangled noise against his neck—somewhere between a whimper and a laugh.
Akeno buried her face in his shoulder—shoulders shaking with silent giggles.
Grayfia Lucifuge (15:04): I would like to walk around mine. Just once. To see what's on the other side without someone telling me I mustn't look.
Arto typed one final reply—short, simple, devastatingly gentle.
Arasto Atreides (15:05): Then look. I'll stand beside you while you do. No judgment. No leash. Just… someone who wants to know what you see.
He hit send. Then—very carefully—set the phone face-down on the sheets. Rias and Akeno both collapsed against him at once—Rias muffling a delighted squeal into his chest, Akeno pressing laughing kisses along his jaw. "You're lethal," Akeno whispered between kisses. "Disgustingly, unfairly lethal."
Rias lifted her head—eyes shining, cheeks flushed. "She's going to fall in love with you," she said, half-accusing, half-awed. "And I can't even be mad because you're being so perfect about it." Arto wrapped both arms around them—pulling them in until they were one warm, tangled knot again. "I'm not trying to make her fall in love," he murmured into their hair. "I'm trying to make her feel safe enough to choose whatever she wants. Love. Freedom. Solitude. Whatever it is. She gets to decide. Not me. Not the elders. Not Sirzechs. Her."
Akeno nuzzled closer—voice muffled against his throat. "That's exactly why she's going to fall in love with you, idiot. But seriously, where did you learn all talking to make women fall for you thingy?"
Arto thinks for a moment before answering "It's psychological knowledge cobined with people reading, I identified what she needs, Grayfia in this case, she needs someone to talk to her like a person instead of a tool or a Pawn, and the topic is about books, specifically Dune due to her knowledge of my made up name. I used those intels to make her feel comfortable around me when we talked about what she is interested in, and when I add playful politeness and some sincerity, I formed a new relationship one a small similarity"
He stops for a moment before continuing "You see, I was stuck in the Void for thousands of years, living in complete solitude. That's not mentioning this" the spell that has been maintaining his clean facade wears off, leaving a man with scars running all over his body and his skin turns from the healthy tan to the darker shade of gray. This is something that Rias and Akeno might have forgotten from the first day they met him, when they removed his armor and saw.....this, the barest version of Arto Abyssgard. From then on, he kept maintaining a spell that would cover all his scars, showing the world a man not destroyed by milenials of torment
"It's hard for someone who looks like....this to make any connection or form relationships with almost anyone. It led to my one and only fear, loneliness. In order to deal with that, I need to use my words, my speech and knowledge to make people....you know, tolerate me enough to keep talking to me. But, seeing this me now, after 4 months together....is it....hard to look at? When underneath such prestine is someting.....like this?"
Akeno lifted her head slowly from his throat, violet eyes locking onto his—soft, unflinching, utterly devoid of revulsion. Rias shifted in perfect sync, propping herself higher so she could cup his cheek and turn his face fully toward her. Neither woman recoiled. Neither flinched. Neither looked away.
Rias spoke first—voice quiet, steady, thick with something fiercer than tenderness. "Hard to look at?" she repeated, almost incredulous. Her thumb traced the edge of the longest scar that curved along his jaw, the one that had once been a whip-lash from a chain forged in the ninth circle. "Love… this is the map of every single day you chose to keep breathing when the Void told you to stop."
She leaned in—pressed her lips to the exact center of that scar. "Every line. Every burn. Every tear in the skin. I have kissed every single one of them before. I will kiss every single one again. And again. Until you forget there was ever a time you thought we might look away."
Akeno's hand slid up—fingers threading through his hair to cradle the back of his skull while her other palm flattened over the thick, ropey scar tissue that ran diagonally across his chest—the remnant of a blade that had once tried to split his heart in two.
"Hard to look at?" she echoed, softer, almost laughing through the emotion thickening her throat. "Darling… this is the body that carried the last leader of the Abyssgard Legion through a thousand years of hell and still came out the other side gentle enough to cradle children in dreams. Still kind enough to text a grieving stranger goodnight. Still brave enough to walk into a viper's nest just to give one woman the right to say 'no'."
She leaned down—kissed the worst of the chest scars, slow and deliberate, letting her lips linger until she felt his heartbeat stutter beneath them. "We didn't fall in love with flawless skin," she whispered against the ruined flesh. "We fell in love with the man who survived having it torn off again and again… and still chose to hold us like we were the fragile ones."
Rias's fingers slid down to cover Akeno's hand where it rested over the deepest scar. "We've seen you," Rias said—voice cracking only once. "The real you. The first night we took off your armor. The nights you woke up gasping from the Arena and tried to hide the shaking. The mornings you thought we hadn't noticed the way you sometimes flinch when someone moves too fast behind you. We've seen it all. And we stayed. We stayed because this—" she pressed her palm flat over his heart, right where the worst scars converged "—this is still beating. Still choosing us. Still choosing kindness even when the world tried to carve it out of you."
Akeno lifted her head—eyes shining, but smiling. "So no," she murmured. "It's not hard to look at. It's hard to believe we get to be the ones who get to touch it. Kiss it. Hold it. Love it. Every ruined, beautiful inch."
Nami circled Arto once—slow, theatrical, like she was appraising a new luxury car on the showroom floor. Her eyes roamed from the deep, ropey scars that crisscrossed his chest and shoulders, down the jagged lines that wrapped around his ribs like old lightning strikes, to the paler, more precise surgical-looking marks along his forearms and the faint burn patterns that spiderwebbed across his back.
She stopped in front of him, hands on hips, head tilted. "Ohh~ So this is how my perfect boss actually looks like," she drawled, voice dripping with exaggerated drama. "All this time I thought you were just annoyingly handsome under the clothes. Turns out you're annoyingly handsome and a walking battle map."
Arto's smirk flickered—small, self-aware, but real. He didn't bother covering up or turning away. Just stood there, arms loose at his sides, letting her look. "Scared?" he asked—voice low, half-teasing, half-testing. Nami snorted—loud and unladylike. "Scared? Please. I've seen worse on my bank statements after a bad trade week."
She stepped closer—reaching out without asking—and traced one long, silvery scar that ran diagonally from his left collarbone down to his right hip with the pad of her index finger. No hesitation. No flinch. Just casual, proprietary curiosity. She stepped back half a pace—arms crossing, grin turning wicked. "But I gotta admit… if I'd met this version of you first? Before the whole 'gentle giant who burns breakfast and forgets his keys' routine? Yeah. I might've needed a minute. Or ten. You look like you stepped out of a cautionary tale about what happens when someone pisses off a god and lives to regret it."
Robin—still leaning against the compartment wall—shook her head slowly, raven hair shifting like ink. "No," she said simply, voice soft but carrying across the quiet space. "I've known you long enough to know you pack more inside that head than in your skin."
She pushed off the wall—gliding closer until she stood beside Nami—then reached up, fingers hovering just shy of touching one of the longer scars that curved along his collarbone before disappearing beneath the shirt collar. "But you're right," she continued, gaze steady and unflinching. "If I didn't know better—if this was the first version of you anyone ever saw—it would be hard to start a conversation. People would see the scars first. The silence. The weight. They'd assume danger, or tragedy, or something broken beyond repair. They'd hesitate. They'd keep distance."
Her hand finally settled—light, warm—palm flat against the worst of the chest scars, right over his heart. "But when we got to know you… it's hard to turn away. Impossible, really. Because underneath all of it is still the man who remembers how Akeno likes her tea, who notices when Rias is pushing too hard, who lets Nami rant about profit margins at 3 a.m. without ever telling her to shut up. The man who just spent twenty minutes texting a grieving stranger like his own heart wasn't already carrying centuries of grief."
She smiled—small, fond, almost wistful. "So yes… that spell did you well. It let people see the man before they saw the map of every war you survived. But we've seen both versions now. And we're still here." Nami—uncharacteristically quiet until now—finally spoke, voice softer than usual. "Scars don't scare us, boss. They just remind us how many times you chose to keep going. And how lucky we are that you chose to keep going here."
She stepped forward—looped her arms around his waist from the side—and squeezed. "So quit asking if it's hard to look at. It's not. It's hard to believe we get to be the ones who get to love it."
[Timeskip: Brought to you chibi Nami, Rias, Akeno and Robin sleeping together]
The train's rhythm was a steady, soothing pulse beneath the wheels—soft enough that most passengers had long since drifted off. The private compartment Arto occupied had dimmed to a warm amber glow, the only light coming from the small reading lamp clipped to the fold-down table beside his seat.
He sat alone now—book open on his lap, phone resting beside it, quietly answering a stream of late-night questions from the students who hadn't quite let the day end:
Kiba asking about resonance harmonics in dual-wielded blades Koneko sending a single photo of her latest gravity training log with a single word: "More?" Tsubasa quietly asking for clarification on emotional anchoring under fatigue Tomoe wondering if there was a way to adapt the intention-indexing rune for archery precision
Arto typed replies one by one—patient, precise, never rushed—even as his own eyelids grew heavier.
Across the corridor, the door to the women's sleeping carriage had slid shut some time ago. Rias, Akeno, Robin, and Nami had disappeared inside together with suspiciously coordinated giggles and a chorus of "good night, darling~" thrown over their shoulders. Arto hadn't asked why all four were sharing one bed. He had a strong suspicion it had something to do with Rias and Akeno's ongoing lucid-dream training under Robin's guidance—probably a group exercise in constructing a shared sanctuary space to shield against the Dark Arena. Nami's presence was almost certainly just… Nami. She'd probably declared it "cuddle solidarity night" and refused to be left out.
He didn't mind. The quiet let him focus. Until the soft click of another door interrupted him. Sona stepped into the compartment—still in her light summer dress, glasses reflecting the lamp's glow, posture perfect even at this hour. She carried a slim notebook and a single pen, like she'd come prepared for a lecture rather than a midnight conversation. "Arto," she greeted—voice low, respectful. "May I sit?"
He gestured to the seat opposite without looking up from his phone. "Of course." She settled—back straight, notebook on her lap. "I wanted to ask about the teacher qualification test," she began without preamble. "Rias and Akeno have been… vocal about their success. The certificates. The co-author status. Their names in the next edition. They've been carrying the books around like trophies for weeks."
Arto's lips twitched—just a hint of a smile. "They're proud. They earned it." Sona adjusted her glasses—once, precise. "I know. But I'd like to take the test myself. By the end of this vacation, if possible. I want to understand what it entails. The difficulty. The expectations. I want to be ready." Arto finally set the phone down—gave her his full attention. "You're already one of the strongest tactical minds in both peerages," he said gently. "You don't need a certificate to prove anything."
Sona's mouth pressed into a thin line—annoyance flickering behind her composure. "Perhaps not. But I'm tired of hearing about it every breakfast. Every dinner. Every time we're in the same room. They've turned it into a running joke, and while I know they mean no harm… it's beginning to grate."
Arto studied her for a moment—then nodded once. "Alright. I'll arrange it. End of vacation—same format. Presentation, written exam, toddler test. Robin and Nami will proctor again. I'll be there." Sona exhaled—shoulders dropping a fraction in relief. "Thank you." Arto leaned forward slightly—voice dropping. "But I'm going to remind you of something before you start preparing."
She met his gaze—attentive. "The true spirit of the test isn't getting your name printed in the book. It isn't homework duty revoked. It isn't bragging rights over Rias and Akeno. It's about whether you can help advance the knowledge further. Whether you can see something me and my people missed. Whether you can make the book better—not for ego, not for prestige, but because you genuinely believe it can serve the next generation more effectively."
He held her eyes—steady, unyielding. "If you're doing this because you're annoyed at their boasting… then you're doing it for the wrong reason. And you'll burn out before you finish the presentation. But if you're doing it because you want to carry the torch forward—because you see cracks they didn't, because you want the students who come after you to have better tools—then you'll pass. Not because I want you to. Because the work will demand it. Anyway, let's me ask you something first, have got found the part in the book that you want to improve?"
Sona thinks for a moment before answering "I am thinking of adding a new chapter to the book." Arto's eyes go wide hearing her proposal, becase what she wanted to do isn't any small shiftment, it's an entire new aspect "Okay, you've captured my attention, tell me, what aspect are you going to add to my book? I remember we've captured every aspect of magic" Arto leans towards Sona with absurd excitement.
Sona met Arto's sudden, almost childlike excitement with the calm composure that had become her trademark. She adjusted her glasses once—slow, deliberate—before speaking. "I want to add a new chapter titled 'Mana Governance & Systemic Spell Architecture'."
Arto's eyebrows shot upward. He leaned forward even further, elbows on knees, the book now forgotten on the seat beside him. "Continue," he said—voice low, but vibrating with genuine intrigue.
Sona opened her notebook to a page already dense with neat handwriting and several small hand-drawn diagrams. "The current book is exceptional at the micro-level: individual sigils, single-spell intention, personal mana-flow optimization, tactical combat applications. But it treats magic almost entirely as an individual act. A single caster, a single circle, a single purpose."
She tapped one of the diagrams—a simple circle surrounded by dozens of faint branching lines. "What happens when the same spell is cast simultaneously by hundreds or thousands of casters across an entire battlefield, city, or territory? When leyline nodes are shared? When ambient mana is being drawn from overlapping domains controlled by different clans or factions? When political, territorial, or even seasonal mana currents interfere with each other?"
Arto's eyes narrowed—already following. "You're talking about large-scale spell ecology. Systemic resonance. Governance of mana as a shared resource."
"Precisely." Sona turned the page—revealing a second, far more complex diagram: interlocking circles connected by directional arrows, overlaid with what looked like leyline maps and faction boundaries. "The Legion never needed this because Hell's mana density was so high and so uniform that individual casters rarely interfered with each other on a macro scale. But in our world—where leyline density varies wildly by region, where clan territories create artificial mana borders, where seasonal festivals or wars can spike or drain ambient levels—large-scale magic becomes chaotic very quickly."
She pointed to a central node labeled "Governance Layer".
"I propose a new layer of meta-formulas—higher-order sigils and control arrays—that sit above the conventional spell structure. They would act as 'governors': regulating mana draw from shared sources, preventing destructive resonance cascades, enforcing priority queues during simultaneous casting, even allowing temporary 'borrowing' of mana from allied territories under strict treaty conditions."
Arto was completely still now—only his eyes moving rapidly across her diagrams. "That's… ambitious," he said after a long beat. "You're not just improving existing formulas. You're proposing an entirely new discipline. Macro-level spellcraft. Mana diplomacy encoded into the architecture itself."
Sona nodded—small, certain. "The book has taught us how one person casts a spell. I want to teach how a society casts spells. How an army, a city, a nation can coordinate magic without tearing itself apart. How alliances can be reinforced not just by treaties on paper… but by treaties written into the very flow of mana itself."
She closed the notebook—then met his gaze directly. "That is the chapter I want to write. Not because Rias and Akeno have certificates. Not because I want to silence their teasing. Because I believe the next generation—our students, our children—will need tools to manage magic at the scale of kingdoms, not just individuals. And right now… those tools don't exist."
Arto remained silent for several long seconds—long enough that Sona began to wonder if she had overstepped. Then he leaned back—slow exhale through his nose—and smiled. Not his usual small, restrained curve. A wide, genuine, almost boyish grin—the kind he almost never showed anyone. "You just proposed turning Spellcrafting Formulas into the first true treatise on macro-magic governance since the Legion collapsed. A discipline that doesn't exist yet. And you want to write the founding text."
He laughed—low, delighted, the sound startling in the quiet compartment. "Of course you can take the test. Of course I'll arrange it. Hell—I'll clear an entire day in Sector 1 for live macro-scale simulations if you need them."
Sona's composure cracked—just a fraction. The corner of her mouth lifted in the smallest, proudest smile. "Thank you." Arto leaned forward again—eyes bright with the same excitement he'd once shown when he first showed them the Simulation Room. "But understand this: if you pull it off—if your chapter holds up under scrutiny—it won't just earn you a certificate. It will change how every future generation thinks about large-scale magic. You're not adding a chapter. You're founding a field."
He extended his hand across the table. "When you're ready—bring me the draft. We'll tear it apart together. Then we'll rebuild it stronger." Sona took his hand—firm, equal. "I will." She rose—notebook clutched to her chest—then paused at the door. "Good night." The door slid shut behind her.
Arto leaned back against the seat, the gentle sway of the Crimson Line fading into white noise as his mind slipped somewhere far older, far darker. The compartment lights dimmed automatically—sensing no movement, no need for brightness. Only the faint crimson glow from the window panes remained, painting slow, bloody streaks across his face. His phone lay forgotten on the cushion beside him; Grayfia's last message still open, unanswered.
He didn't see the train anymore. He saw the Lowest Ring of Hell. He was at his home. The pit at the center—endless, lightless, vomiting abyssal horrors in waves that never slowed, never tired, never learned mercy. Ten concentric walls of black adamant and blood-forged steel, each layer reinforced with every macro-spell the Legion could muster. Gravity wells to crush legions at once. Flame fronts that burned hotter than stars. Mana storms that scoured flesh from bone across kilometers.
And him—at the war table in the heart of the citadel—watching mana crystals deplete faster than they could be replaced. He remembered the arguments. The war council shouting over maps stained with ichor and ash. "Scale up the resonance arrays!" "We can't—the leyline nodes are fracturing under the load!" "Then divert from the rear lines—" "We have diverted! There's nothing left!"
He'd made the call. Pushed the arrays to breaking point. Watched the walls hold… then crack… then fall. Ten million legionnaires. Gone. Not in one glorious last stand. Not in a blaze of defiance. Just… spent. Like candles burned down to stubs because he'd miscalculated the fuel. Because he'd treated macro-magic like micro-magic with bigger numbers. Because he hadn't understood that scale wasn't just quantity—it was interaction. Resonance bleed between layers. Feedback loops across leyline borders. Mana governance—or the lack of it—turning coordinated power into a self-devouring storm.
He hadn't seen it then. Couldn't see it. He was twenty-three centuries old, yes—but still too young in the ways that mattered most...Too late now....Always too late. The Stabilizer had come millennia after the fact—born in the Void, forged from regret. A tool to make mana stable, clean, endless. A tool that would have saved half the Legion if he'd had it then. But even that… even that might not have been enough.
Because the flaw wasn't just in the mana. It was in the mind that commanded it. Sona's proposal—Mana Governance & Systemic Spell Architecture—wasn't just clever. It was the missing piece he'd never known he was missing. A new chapter. A new discipline. A way to think about magic not as individual acts of will… but as an ecology. A living system that needed rules, balance, oversight—exactly the way armies needed supply lines, communication chains, and command hierarchies that actually worked.
If he'd had that chapter back then… If he'd had Sona's mind looking at the macro-scale instead of just pushing more power through the same failing pipes…maybe there would have been survivors. Maybe the Legion wouldn't have been reduced to one scarred, broken man wandering the Void for millennia.