"That won't be necessary."
"Trust." A faint smile. "An efficient arrangement."
They moved deeper into the laboratory. Orochimaru guided without seeming to guide—a question here, a gesture there, leading Tatsuya toward specific displays while maintaining the illusion of free exploration.
"Here." He stopped before a larger preservation unit. "This may interest you specifically."
The specimen was a complete tenketsu network—three hundred and sixty-one points mapped in crystalline detail. The tenketsu density was unusual—far beyond standard human variation. It took him a moment, cross-referencing what he'd seen in the field, before it clicked.
"Hyuga."
"A branch family member. Deceased during a border skirmish, body recovered by Konoha forces. The family donated the remains for medical research rather than traditional burial." Orochimaru's voice remained academically neutral. "The Byakugan has fascinated researchers for generations. But the tenketsu network itself is equally remarkable."
Tatsuya studied the preserved pathways. The gentle fist style wasn't just taijutsu; it was chakra architecture, the entire body optimized for chakra manipulation in ways that standard shinobi training couldn't replicate.
"The configuration is inherited, not developed."
"Precisely." Orochimaru's eyes gleamed with genuine intellectual interest. "Kekkei genkai are not merely techniques. They are fundamental alterations to chakra system architecture. The Hyuga don't learn to see chakra; they're born with the neural pathways that enable it."
"Which means the information for proper development is encoded somewhere in the cellular structure."
"Yes." The word was simple, but Orochimaru's attention sharpened visibly. "This is what interested me about your research requests. You are not asking how to repair tissue. You are asking how tissue knows what it should become."
Tatsuya considered his response carefully. Orochimaru was showing him exactly what he wanted to show—nothing more. The question was why.
"So the information storage... using kekkei genkai as a model for how tissue encodes what it needs to become."
"One application among many." Orochimaru moved to another display, a comparative study of chakra pathway configurations across different individuals. "The cellular template research Kato began decades ago approached the problem from one direction. I have approached it from another. Perhaps..." He let the implication hang.
"Perhaps the approaches complement each other."
"Perhaps." Orochimaru's thin smile gave nothing away. "I make no demands, Meguri-san. Only observations. We are both researchers pursuing understanding. If our work occasionally intersects, that seems... natural."
The whole exchange felt rehearsed. Not a pitch, exactly—but not spontaneous either. Tatsuya couldn't tell if Orochimaru was recruiting him or just... collecting.
"The specimens are valuable," he said carefully. "Thank you for the access."
"I expect you will use them well."
"I expect I will."
Orochimaru inclined his head slightly, the gesture of someone who had accomplished exactly what they intended. "My laboratory is available to you. Research hours, of course. The archives may prove useful for your cellular template work."
Tatsuya filed this away. The offer was legitimate. The knowledge was valuable. And Orochimaru was patient enough to wait years for whatever return he anticipated.
The question was what Tatsuya was willing to learn, and what price he'd eventually be asked to pay.
"I should return to my other responsibilities."
"Of course." Orochimaru walked him toward the exit. "Do keep me informed of your progress, Meguri-san. Research thrives in proximity to... compatible curiosity."
The door closed behind him. Tatsuya walked back toward Section Seven, turning over what he'd seen—and what Orochimaru had chosen not to show.
---
Training Ground Twelve at dusk.
Minato stood at the edge of the clearing, arms crossed, watching Tatsuya's latest attempt with the patient assessment of someone who'd been doing this for hours.
"Again."
Tatsuya drew breath, centered his chakra, and released.
Wind chakra spiraled outward from his palms, the same technique he'd used for the wind scalpel, now attempted at larger scale. The goal wasn't precision anymore but volume, sustained output that could affect an area rather than a single point.
The technique held for four seconds, then collapsed into turbulent nothing.
"Better." Minato's voice was neutral. "You're still treating it like fire."
"Volume is volume. I can sustain Great Fireball for—"
"Fire sustains itself. You give it fuel and direction, and the combustion does half the work." Minato stepped closer. "Wind doesn't work that way. There's nothing to burn, nothing to consume. The moment you stop actively pushing, it disperses. You're fighting the nature instead of working with it."
Tatsuya shook out his hands, trying to release the tension. Fire nature made sense to him: ignition, direction, let it burn. Wind was different. Every attempt to sustain output felt like holding water in cupped hands.
"Help me understand what I'm doing wrong."
"You're trying to contain it. Wind doesn't want to be contained; it wants to move." Minato demonstrated with his own chakra. Wind nature rippled around him, not shaped, just present. Flowing freely, unstructured. "Watch. With fire, you set the direction and let combustion carry it. With wind, you have to keep feeding it without strangling the flow. Constant output, loose grip."
The wind expanded outward in a sustained wave, carrying with it the kind of raw power that combat jutsu required. It held for fifteen seconds before Minato let it dissipate naturally.
"The scalpel works because you're shaping a tiny amount of wind with absolute precision. But area techniques need volume, and volume with wind means accepting that you can't control where every current goes." He met Tatsuya's eyes. "You have to push without directing."
"That's... counterintuitive."
"It's the opposite of what you do with fire, and the opposite of the scalpel. That's why it's hard." Minato shrugged. "Your fire techniques work because fire wants to spread. Your scalpel works because it's small enough to control completely. Sustained wind is the middle ground, too much output to micromanage, but no self-sustaining reaction to carry it. You have to learn to feed it continuously and not choke it."
Tatsuya considered this. His fire techniques did rely on combustion doing most of the work after ignition. The wind scalpel was the opposite extreme, total control over a minimal amount. What Minato was describing required a completely different mental framework.
"Again," he said.
"Good. You stopped fighting it that time."
Tatsuya centered himself, drew wind-natured chakra, and this time—instead of directing it like fire or shaping it like the scalpel—he just pushed. Continuous output, loose grip.
The result was messy, chaotic, wind chakra scattering in half a dozen directions, more explosion than technique. But it held for six seconds before his concentration broke.
"Longer that time."
"It felt terrible."
"It looked terrible too." Minato grinned. "But it worked. Another hour of practice and you might manage anything actually useful."
They trained until full dark. By the end, Tatsuya could sustain ragged wind output for ten to twelve seconds, nothing like the controlled precision of his scalpel work, but functional. A foundation to build on.
Minato walked him through the theory again while they rested. How wind nature required constant feeding unlike fire's self-sustaining combustion. How the same chakra nature could serve completely different tactical purposes depending on whether you were shaping or flooding.
"You're too in your head about this," Minato observed.
"Probably."
"Definitely." He tossed Tatsuya a canteen. "You've trained yourself to control everything. Fire gives you the illusion of control because combustion is predictable. Wind doesn't give you that. You have to accept the chaos."
"That's not how I usually operate."
"I know." Minato shrugged. "But you adjusted faster with the scalpel than you did with fire. Give it a week."