And yet, Kazuki was still trying to move his hips.
'This is bad. Any more than this!'
Without thinking, Serafall seized Kazuki's face between both hands and pressed her lips to his…
"Nnmu!?... Nn, nn, slurp-lero..."
She plunged her tongue deep into his mouth, tangling it with his, sucking and savoring his saliva. Though initially startled, once Kazuki realized it was Serafall, he matched her movements, deepening the kiss, entwining their tongues further.
For a good five minutes, they tangled their tongues and lips together before finally pulling apart. The silver bridge stretching between them snapped with a wet sound, leaving a stain on the chest of her clothing.
"Sera-nee, why...?"
"Phew... Have you calmed down, Kazu-kun? Listen. Artoria-chan's at her absolute limit. If you fuck her any more, you'll break her."
"Ah...!"
As if his head had cooled a fraction, Kazuki took in Artoria's pitiful state and fell silent. Serafall wrapped him in a tight hug.
"Just as long as you understand. And so—if you still haven't had enough, this girl here says she'll take over."
She slapped Rossweisse on the ass.
"Hyaan!!"
Letting out an adorable squeal, Rossweisse leaped forward, landing one step ahead of Serafall, directly in front of Kazuki.
Still clearly not mentally prepared, Rossweisse shot Serafall a reproachful glare.
In response, Serafall simply raised a thumb—infusing it with all the meaning of "Good luck."
Having been quite literally booted in the butt by Serafall, Rossweisse now stood before Kazuki. There was no backing down now.
Drawing a single deep breath…
"Kazuki-san, please form a contract with me!!"
Overcome with nerves, she had blurted it out with zero subtlety.
"That's the 'Valkyrie's Contract' you mentioned yesterday, right? I'm a devil, you know. Are you sure about this?"
Yet Kazuki didn't comment on her delivery and simply asked in return.
"Yes. Watching your battle with Thor, I became absolutely certain—you are the only one who can be my Einherjar."
Kazuki rose to his feet and slowly looked her over from the top of her head to the tips of her toes. Then, he pulled her body close.
"Once we form this contract, I'm going to fuck you immediately. Still okay with that?"
Kazuki stared straight into her eyes, asking as if giving her one final chance. Rossweisse clasped her hands together as if in prayer and closed her eyes.
After a moment, she felt a hot, soft sensation on her lips. Her first kiss with Kazuki was a gentle one, without entwining tongues or exchanging saliva—but its heat and sweet, melting tenderness would linger in her memory forever.
"Fine. Let's form the contract, Rossweisse. So what do I need to do?"
Parting their lips, Kazuki asked about the contract's procedure.
"Hold me, just as you are... The contract is sealed when I receive your seed within my womb..."
After answering, this time Rossweisse pressed her lips to his of her own accord.
"Nnmu... chu, nnf, nnn... slurp, ahh, nnn."
Beside the bed, Kazuki and Rossweisse pressed their lips together, deep and hard.
Kazuki aggressively slipped his tongue inside, ravaging her mouth and feeding her his saliva. Rossweisse, too, desperately responded to his movements, tangling her tongue with his and swallowing down every drop.
'Nnaahh, so this is Kazuki-san's kiss... Amazing, it feels so good my head's melting.'
As Rossweisse grew dizzy from her very first kiss, Kazuki's hands reached for her clothes. He removed her jacket, loosened her tie, unbuttoned her blouse, pulled down the zipper, and let her skirt fall to the floor.
Through it all, their lips never parted, the room filling with obscene, wet sounds and heated gasps.
"Ahhn, ahn, nnn! Ka-Kazuki-san, that spot is!"
With her blouse pulled open and the heavy, ripe twin mounds squeezed over her bra, Rossweisse couldn't stifle her voice. Her tits were colossal, rivaling Rias's, and even through the bra, the supreme softness and exquisite kneading sensation transmitted straight to his hands.
"Nnah, ahn! Kazuki-san, no! My chest... my tits, you can't... nnaahn, stop it!"
Though she was clearly reacting to the sensation, Rossweisse visibly disliked having her boobs played with. Kazuki shot her a suspicious glance.
'Doesn't seem like she's frigid, but the way she's resisting... Does she have some kind of complex about them?'
Without fully understanding what Rossweisse disliked so much, Kazuki seized an opening, unhooked her bra, and yanked it off in one swift motion.
"This is...!?"
Rossweisse's massive tits spilled out with a heavy bounce. In color, firmness, size, and shape—they were flawless, supremely perfect twin breasts. But their peaks were unlike anything ordinary: her nipples were completely inverted.
"Uugh... That's why I said no."
Ignoring Rossweisse's mortified whisper, Kazuki studied the inverted nipples—a sight entirely new to him—with fascinated curiosity, and gently trailed his fingers over them.
"Hyuu! Ka-Kazuki-san, what are you...?"
"Hmm? Your nipples seem a little shy, Rossweisse... So I thought, maybe if I do this, they'll poke their heads out."
Kneading her breasts, Kazuki teased her areolae with the tips of his fingers, tracing them in a scratching, tickling motion.
"Nhyii! Hnn! Nnn! Yaahn, what is this!?"
"Does it tickle?"
"Partly ticklish, but that's not all... It's like a buzzing, numbing feeling, and yet... nnn!"
"Does it feel good?"
Blushing, Rossweisse shyly averted her eyes—but gave a tiny, timid nod.
"Ahfuun! Ahn! Kazuki-san, you can't! Something like that—aaahn! Nooo!!"
The moment Kazuki realized Rossweisse was feeling it, he pushed her down onto the bed and latched his mouth onto those still-buried nipples. He teased the wide areolae with his lips, worked his tongue as if digging the nipples out, and kneaded her tits as if milking them.
"Hahii! Hyuun! No way... Ah, I don't want this, my tits are feeling it... Uhyiiinn!!"
When he gently bit down on the entire areola, Rossweisse's body spasmed with a violent jolt. Casting a sidelong glance at her gasping form, Kazuki slid his fingers over her panties—already soaked and faintly see-through—tracing along her mons pubis.
"Ahhyinn! Aaahn! Kazuki-san, not there either!!"
"That's off-limits too, huh? You've sure got a lot of 'no' zones, Rossweisse."
Teasingly, Kazuki traced his fingers along the clearly outlined slit through the fabric.
"Nnn! That spot... It's just... It's already so wet... ahn! It's... dirty, so..."
Kazuki pushed Rossweisse's panties aside, exposing her crotch. From the bare, uncovered flesh, her love juice overflowed. Her silver bush clung to her slick, wet skin, releasing a rich, heady scent—utterly and obscenely lewd.
"Doesn't seem like you do much grooming down here, Rossweisse. Look, it goes all the way back to your ass."
"!!!?"
When Kazuki tugged gently on her silver pubic hair, Rossweisse's face flushed scarlet with shame.
And then…
"Sniff sniff. Your scent's incredible too. You've got a real strong, thick female smell, Rossweisse."
Having her lack of grooming pointed out, and her scent so openly inhaled, Rossweisse felt like she'd been utterly rejected as a woman, and tears of humiliation and disgrace welled up in her blue eyes.
"Hyuuu!? Ahn, yaahn, Kazuki-san, don't lick a place like... fuaann! Aaahn, noooo!"
Just as she was on the verge of tears, Kazuki buried his face in her crotch, his fingers and tongue slithering and crawling all over her. The sudden stimulation made her tears retreat, and her body writhed instead under the assault of overwhelming pleasure.
'Oh no, Kazuki-san's tongue is going inside... ahn! If he keeps rubbing my clit like that... nnn! It feels so, so good!!'
His tongue thrust in and out, slurping her juices. His finger teased her asshole. He toyed with her clit. Exposed to a pleasure she had never once felt during all her times masturbating, Rossweisse rocketed toward the peak in one breathless climb.
"Ahn, yan, aahn, ahn... If you keep doing that, haaahn! I-I'm going to cum."
"That's it, Rossweisse. Just like that. Let your voice out. Don't be embarrassed. Show me your true, lewd face!!"
Kazuki's fingers, which had been fucking her pussy, scraped across her G-spot, and he gave her clit a gentle, nibbling bite. The greatest wave of pleasure yet surged through her entire body, and Rossweisse climaxed.
"H-Hiii—ihhiiiiinn!!"
Rossweisse's hips bucked upward violently, and the spray of her squirting soaked the bed and Kazuki alike. Face dyed bright red, she basked in the daze of her very first orgasm.
Kazuki positioned his fully erect, throbbing cock right before Rossweisse's eyes.
'So this is Kazuki-san's... It's incredible, so huge... Is this really going to fit inside my pussy?'
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