The air on the third floor of the Academy left a taste on the tongue.
Not just humidity. It was the friction of eighty-seven armed teenagers, five different hidden villages, low ceilings, bad ventilation.
Ren walked with his hands in his pockets, a chilled can of unsweetened green tea held loosely between two fingers of his left hand.
His sensory radius hummed at fifteen meters. In his mind's eye, the hallway ran as a heat map of erratic chakra. Two Grass Genin to the left, knuckles tapping their thighs, pulses at a hundred and ten. Ahead by the notice board, three Sand shinobi stood motionless, chakra cold and compressed like wet clay.
He took a sip. The bitterness was clean. Good temperature control in these vending machines.
"Hey. Reserve."
Ren paused outside the double doors of Classroom 301.
Leaning against the wall was a Rain ninja with a rusted steel respirator and three umbrellas strapped across his back. Frayed sleeves. Fingers wrapped in stained white linen. His weight was shifted slightly forward, jaw tight beneath the respirator filter.
"You're walking awful slow for someone who came alone," the Rain Genin muttered, his voice flat through the filter grating. "Where's the rest of your squad, Leaf? Did they drop dead on the way up the stairs?"
Ren glanced at him. His grey eyes were mild, devoid of the defensive snap common among Genin who had their pride poked. He let the silence sit for one beat—not long enough to be a challenge, just long enough to be unhurried.
"Solo allocation," Ren said pleasantly. "Less paperwork when submitting mission logs. Saves on travel expenses too."
The Rain ninja stared through his goggles, clearly expecting a snarled threat or a flustered reach for a weapon. He blinked once. Then again. His weight settled back against the wall.
"...That's it?" Flat disbelief through the respirator.
"Did you want a longer one?"
The Rain ninja grunted something unintelligible and turned back to the wall.
Ren gave him a polite nod and pushed through the doors.
…
Room 301 was an amphitheater of simmering hostility.
Desks rose in tiered semicircles toward the back wall. Shinobi from Mist, Cloud, Sand, Grass, and Waterfall occupied the upper rows, arms crossed, headbands gleaming under pale fluorescent lights. The ambient noise was muffled challenges and the rhythmic scrape of sharpening stones against steel.
The Konoha rookies were clustered in the second row.
Naruto was on his toes, fists clenched white, looking like a firecracker two seconds from the powder. Sakura was pulling at his collar. Sasuke stood three paces back, arms folded, staring at the three Sand siblings in the center row. Kiba was baring his teeth at a Mist ninja who'd made eye contact. Hinata sat with her fingers threaded together, shoulders drawn in, eyes down.
Then Naruto's gaze swept the doorway.
"REN-NIISAN!"
Half the room flinched. Several Grass ninja reached for their pouches before realizing it was just an idiot in an orange jumpsuit.
Naruto broke from Sakura's grip—she grabbed at his collar and caught nothing—and sprinted down the aisle, skidding to a halt with a wide, toothy grin.
"Niisan! You really came!" He dropped into a stage whisper loud enough to carry two full tiers. "Look at all these weirdos! That guy in the back is wearing full face makeup, and that one over there has bandages all over his face like a mummy! Don't worry, I'm totally gonna crush every single one of them!"
Somewhere above, a Mist kunoichi turned her sharpening stone over with a slow, deliberate scrape.
Ren pulled the can from his mouth and pressed the chilled metal against Naruto's forehead.
Naruto yelped, stumbling back a half step. "Ack! What was that for?!"
"Lower your shoulders." His voice cut through the room's noise without rising. "You're burning twenty percent of your stamina staying that tense. You'll walk into the first stage already winded. Breathe in through your nose—three seconds."
Naruto opened his mouth. Closed it. His chest rose. Fell. His shoulders dropped an inch, the white-knuckle grip loosening slightly.
"...Oh. Huh. Right."
"Good." Ren reached into his pocket and tossed him a wrapped honey candy. "Eat that. Your blood sugar is low."
Naruto caught it reflexively. "How do you even know—"
"Because you skipped breakfast again."
"I overslept! I was practicing the anchor kata until two in the morning!" He tore the wrapper off with his teeth, then pointed at Ren with the candy still in his mouth, voice shifting to something quieter. "...It's getting better though. The kata. I can hold the second transition without breaking my stance now."
Ren looked at him for a moment. Something shifted briefly at the corners of his eyes. "I know," he said. "Keep at it."
Naruto's grin came back, smaller and more genuine. He turned and trotted back toward his row, pointedly not looking at the Sand siblings watching him with cold, unreadable eyes.
Two rows up, Sasuke had tracked Ren from the moment he walked through the doors. Open hands. Relaxed forearms, zero tension at the wrist—no concealed grip. Footing balanced across both heels, a stance that looked effortless but would let him pivot without shifting his center of gravity first. He was standing in a room full of hostile foreign shinobi with the stillness of someone who was the least worried person present.
Sasuke filed it. Noted it.
Ren's grey gaze moved across the upper tiers and caught Sasuke's for a half-second.
Sasuke gave a single, almost imperceptible nod. Ren returned it with a small smile, eyes dropping briefly to Sasuke's left shoulder.
Shoulder looks better. He actually iced it.
"Hey."
Ino Yamanaka came down the tiered stairs with both hands on her hips, ponytail swinging. Shikamaru descended behind her, hands buried impractically deep in his pockets. Choji followed with a bag of chips held quiet against his side.
Ino's eyes moved over Ren with unconcealed, calculating curiosity. "You're really entering the exams alone? The solo reserve track usually gets pulled for perimeter watch rotation. Not the actual Chūnin finals."
"The Hokage cleared the slot. They needed an even number for the seating grid. I was available."
"Available." She turned the word over like she was looking for a dent. The corner of her mouth curved. "You talk like you're covering someone's shift at a grocery store."
"It's just work, Yamanaka-san. No reason to make it more dramatic than it needs to be."
"That's a very boring way to look at it," Ino said, though her expression hadn't decided if that was a criticism.
"Troublesome," Shikamaru muttered from behind her. He was staring at the ceiling fixtures. "We're standing in the middle of the room broadcasting ourselves while half these squads are mapping our positions. Can we please just sit down before someone decides to start early?"
"Nobody's starting early, Shikamaru, stop being so—"
"He's right, though," Choji said, mildly, around a chip. He gestured at a Cloud ninja in the upper rows who had very subtly tilted his head to get a better angle on their group.
Ino's mouth closed. She glanced up, jaw tightening. Then her eyes came back to Ren—specifically to the way he took the last sip from his can and crushed the aluminum with a single quiet squeeze of two fingers.
She turned without another word, ponytail swinging. "We're sitting down. Don't read into it."
"I wasn't going to," Shikamaru said.
"I know you weren't."
Choji offered Ren a small nod as he passed. Ren returned it.