The training facility was sealed—not restricted, not reinforced, but sealed.
Layered barriers wrapped the space in overlapping formations,
Jujutsu craftsmanship fused with U.A.'s strongest materials.
Ren stood at the center of the room, feeling the weight of it pressing in. Gojo faced him directly, hands in his pockets, while All Might stood a short distance behind, arms crossed.
"This," Gojo said casually, "is where we stop pretending."
Ren swallowed. "You're going to make me use it."
"Yep," Gojo replied. "Both sides."
All Might nodded. "We cannot teach what we do not fully understand."
Ren hesitated. "I don't have control."
Gojo's smile softened, just a little. "Exactly."
"All right," Gojo continued. "Start with the physical one."
Ren clenched his fists. "I don't move things. I don't enhance myself." He looked down. "…I decide when something is allowed to stop."
The air shifted. Gojo's grin widened. "There it is."
Ren stepped forward and threw a punch. It wasn't fast. It wasn't heavy. The training dummy was launched backward—not from impact, but because the force refused to end.
It tore through the wall behind it, then the next, and the barrier screamed as fractures spread. All Might stepped forward instantly.
"REN!"
Ren staggered back, breathing hard. "I didn't mean to—!"
Gojo raised a hand. The destruction froze mid-continuation, debris suspended unnaturally in the air.
"See?" Gojo said calmly. "You didn't hit harder. You just refused to let the motion conclude."
Ren stared at his shaking hands. "That's my quirk…"
Gojo's tone shifted. "Now," he said quietly, "the dangerous one."
Ren hesitated longer. "My cursed technique doesn't attack. It… weakens."
All Might's eyes narrowed. "I can already feel it."
Ren released his cursed energy—not outward, but along the edges of the room. The floor softened underfoot. The walls felt uncertain, as if they couldn't decide what they were.
Barrier lines flickered.
"It erodes the separation between things," Ren said tightly.
Gojo's smile vanished. "Ren. Stop."
Ren tried. The cursed energy didn't listen.
The boundary between inside and outside trembled, and the room began to bleed into itself.
All Might moved instantly, slamming his foot into the floor. The shockwave grounded reality.
"REN! Focus!"
Ren dropped to one knee, clutching his head. "I can't tell where it ends!"
Gojo stepped in front of him.
Infinity flared, forcing the erosion to halt—barely.
Gojo exhaled slowly. "…Yeah. That's Special Grade."
Silence returned, strained and fragile. Ren looked up, fear clear in his eyes. "I didn't mean to do that. It just happens."
All Might knelt in front of him. "That is why we are here."
Gojo crouched beside them. "Your quirk ignores physics. Your cursed technique questions reality."
Ren swallowed. "I'm dangerous."
Gojo smiled—not playfully this time. "You're untrained."
All Might placed a firm hand on Ren's shoulder. "And that can be fixed."
"You will learn control," All Might said. "Not through suppression, but responsibility."
Gojo stood. "And until then, I'm not letting you breathe wrong."
Ren let out a weak laugh. "…Thank you."
"Oh, don't thank us yet," Gojo replied with a grin.
All Might smiled warmly. "This is only the beginning, Young Ren."
Outside the sealed room, something ancient stirred—because power like that does not go unnoticed.