Chương 127: The First Controlled Use
MHA: Scar Tissue Hero · JuliusA · 161 chương · ~46 phút đọc · Tạo 01/09/2026
The first official test of Adaptive Scar Tissue: Graft Lattice began with a sign. That was becoming a pattern. Recovery Girl blamed the students. Kurose blamed the building. Aizawa blamed everyone equally, which was efficient and emotionally lazy. The sign hung on the door of Mobility Room 3 in thick black letters on an ugly yellow background. NOT A HERO TEST Under it, someone had added a smaller laminated card.
NOT A SECRET HERO TEST EITHER Under that, in handwriting that looked suspiciously like Kurose's, there was a third line. IF YOU MAKE THIS SYMBOLIC, RECOVERY GIRL WINS Ren stood in the hallway in a medical chair with wheels locked, a blanket across his knees, and a body that had spent the morning arguing with every concept of readiness. He stared at the signs.
"Too many signs" Recovery Girl stood beside him with one hand on the chair and the other on her cane.
"Too many students with interpretive problems" Kurose, positioned by the door, said "The third sign is preventative care" Aizawa leaned against the wall with his scarf loose around his shoulders and his eyes half-lidded in the way that meant he was extremely awake and extremely unimpressed.
"If the sign fails, we cancel" Ren looked at him.
"Because of symbolism?"
"Because if you cannot obey a door, you do not get a room" Ren turned back to the sign.
"That sounds like a proverb written by a hostile architect""Good" Hana stood behind him with both hands wrapped around a thermos of approved broth. Daichi stood beside her, holding a clipboard he had no official authority to hold and Bentaro tucked under one arm because the umbrella had somehow become emotionally credentialed despite Recovery Girl's protests. Dr.
Seno waited inside the room with monitors, pressure mats, soft bars, three low platforms, two rescue dummies, and the expression of a scientist trying very hard not to look like a scientist. Nezu had been banned from attending in person. He had accepted with terrifying grace and sent one note through Kurose. Observe the student, not the miracle. Recovery Girl had approved the note. Then complained about approving it. Ren looked down at his left wrist. The bandage had been changed that morning.
The skin around it still carried faint pale lines, quiet unless he moved too quickly or panic tried to become useful. His right shoulder hurt. His ribs hurt. His stomach was already hungry despite breakfast. His body felt wrong in new ways and familiar in old ones. He could feel the gates now. Not always. Not perfectly.
But sometimes, before pain vanished wrong, before Repair Scaffold surged like a fire alarm with ambitions, before Scar Tissue had to throw walls across his body, he could feel the beginning of a door. That was why they were here. Not to become stronger. To learn the door. Recovery Girl leaned closer.
"Repeat the purpose" Ren closed his eyes.
"Establish baseline controlled response of Graft Lattice under low mobility strain" Recovery Girl hit the back of his chair with her cane.
"Human" Ren sighed.
"To see what my body does when I move, stop before collapse, and do not become inspirational""Better" Kurose said "Repeat the authority structure""Recovery Girl stops test for medical reasons. Dr. Seno stops test for unsafe data. Aizawa stops test for operational reasons. Kurose stops test for language or consent reasons. Hana and Daichi can ask for pause. I can say stop for any reason" Daichi lifted the clipboard.
"Bentaro has no veto" Recovery Girl said "Correct" Daichi lowered the clipboard.
"Noted under protest" Ren breathed.
"Stop means stop" Kurose nodded.
"No explanation required" Aizawa added "No endurance scoring" Ren opened his eyes.
"No endurance scoring""Say it like you hate it less""I do not""Good enough" Recovery Girl unlocked the chair. The door opened. Mobility Room 3 looked less like a training room than a place where training had been forced to apologize to medicine. Soft flooring. Parallel bars. padded walls. pressure plates. overhead safety harness. cameras angled only at body mechanics, not his face unless he consented. A table with nutrition supplies.
Two chairs for Hana and Daichi behind a clear partition that could be opened if Ren asked. A large red button on three different walls, all labeled STOP. On the far wall, there was another sign. THE GOAL IS NOT LONGER Beneath it, in smaller text: THE GOAL IS CLEANER Ren stared.
"Aizawa" Aizawa did not move.
"Yes""Your signs are worse than student signs""Mine are useful""That makes them worse" Recovery Girl parked the chair near the starting mat.
"Arguing is not warmup""It is emotional mobility""No" Dr. Seno approached with the harness straps.
"Consent to harness?" Ren nodded.
"Yes" She stopped.
"Verbal plus hand sign if possible" Ren lifted his left hand enough to show open palm.
"Yes""Good" The harness was soft, adjusted across chest and hips with more care than the lab had ever used with anything. That was worse in some ways. Better in more. Ren breathed through it. Hana watched from behind the partition, eyes fixed on his face. Daichi's hand rested on Bentaro. Aizawa moved into Ren's line of sight before the first strap tightened.
"Room" Ren answered automatically.
"Mobility Room 3. U. A. medical training wing. Recovery Girl. Dr. Seno. Kurose. Aizawa. Hana. Daichi. left wrist. right shoulder. ribs. harness""Door""Open behind Kurose. ours""Stop""Mine" Aizawa nodded.
"Good" The harness tightened. Ren did not leave the room. The first test was insulting. That was probably why Recovery Girl chose it. Ren had to sit forward without using the right shoulder as a brace. He had done more dramatic things while bleeding in villain territory. He had also nearly fallen out of his own body when pain disappeared wrong, so the room treated sitting forward like an operation. Dr. Seno watched the monitor.
"Baseline heart rate elevated but acceptable" Recovery Girl said "His heart rate hears adults and makes reasonable assumptions" Ren said "Trustworthy" Kurose added "Unfortunately" Aizawa stood in front of him.
"On your count" Ren looked at the floor. The mat had a black line. Not a finish line. A reference line. Less dangerous.
"One" His left hand pressed lightly against the chair. Pain at wrist. Present.
"Two" Right shoulder tried to help. Too much. Pain rose. Graft Lattice flickered at the shoulder edge. A pale thread appeared beneath the skin. Door. Ren felt it. Not open yet. Beginning.
"Stop" He said it before anyone else moved. The pain lowered by a fraction and stayed local. The shoulder remained in the room. The wrist remained in the room. The body remained his. Recovery Girl's eyes sharpened.
"Status""Shoulder gate. local. pain lower, still present. no spread" Dr. Seno looked at the monitor.
"Confirmed. Local pain modulation without body-map disruption" Aizawa said "That is the test" Ren looked up. If you stumble upon this narrative on Amazon, be aware that it has been stolen from Royal Road. Please report it.
"I barely moved""The test was not moving. The test was noticing before useful" Ren hated how much that mattered. Kurose said "Record it that way" Dr. Seno typed. Ren watched her. She turned the tablet slightly so he could see the line. Subject noticed pre-spread pain modulation onset and verbally stopped before expansion. Kurose said "Student" Dr. Seno blinked. Then corrected it. Student noticed pre-spread pain modulation onset and verbally stopped before expansion. Ren looked away fast.
Student still hit harder than Hero Course. Recovery Girl pretended not to notice.
"Again" The second test was standing. It took four adults and two machines not to make it feel like a ceremony. The harness took part of his weight. The parallel bars waited in front of him. The pressure mat under his feet glowed softly where his soles touched through thin medical socks. His hands rested on the bars, left lighter than right because the wrist was not ready for bravery and no one had asked it to be. Recovery Girl stood close. Dr. Seno watched the display. Aizawa stood where Ren could see him.
Kurose stood near the stop button. Hana and Daichi watched from behind the partition like people holding their breath with manners. Ren breathed.
"Map" Recovery Girl nodded.
"Go""Mobility Room 3. mat. bars. harness. left wrist. palms. soles. right shoulder. ribs. hungry. scared" Aizawa said "Useful scared or unsafe scared?" Ren thought.
"Useful scared" Kurose looked at him.
"Dangerous word""Known risk" Recovery Girl said "Proceed" Ren pushed. The first part was ordinary weakness. His thighs complained. His ribs objected. His shoulder tried to brace too soon. His left wrist warned him that the bar existed and would prefer less enthusiasm. Then the soles of his feet changed. Scar Tissue had always remembered pressure. After Sports Festival, after training, after impact and falls and desperate balance, the soles had learned too much about force.
Now pale lines threaded under the skin, invisible beneath socks but felt as a rough internal bracing, distributing load from heel to arch, from arch to toes, up calves that trembled but did not collapse. Ren rose. Not gracefully. Not heroically. He stood. The room went very quiet. Recovery Girl ruined it correctly.
"Do not look proud. Standing is not a personality" Ren breathed out something between a laugh and a sob. The monitor jumped. Recovery Girl glared.
"Do not become emotionally dramatic either""I stood""Yes""I know it is not—" Aizawa cut in.
"No diminishing" Ren looked at him. Aizawa's voice stayed flat.
"You stood. That is data" Ren swallowed.
"Data" Dr. Seno's voice was soft despite herself.
"Load distribution is significantly improved compared to pre-integration projections" Recovery Girl snapped "Careful" Dr. Seno corrected "Significantly different" Kurose accepted that. Ren felt the difference. That was the problem. His legs shook, but not the old way. Before, standing after injury felt like bargaining with failure. Now his body found old stress lines and built supports along them, not enough to make him strong, not enough to remove pain, but enough to make the load less chaotic. Less removable.
He hated that it felt good. He hated that it felt like possibility. His shoulder pain began to lower. The gate tried to widen. Relief offered itself. Stand longer. Show them. Prove the door. Earn the chair. Earn the course. Earn the word student. Ren's fingers tightened around the bar. Aizawa's voice came immediately.
"Ren" Ren closed his eyes. The pain lowered again. Tempting. He said "Stop" The gate narrowed. The pain returned enough to bite. His knees shook harder. Recovery Girl moved closer.
"Sit?" Ren almost said no. Almost. The old answer lived in him. Not yet. More. Hold. Endure. Prove. He looked at the sign. THE GOAL IS NOT LONGER THE GOAL IS CLEANER He hated the sign. He obeyed it.
"Sit" The harness took some weight as he lowered back into the chair. Dr. Seno guided the chair without touching him until he nodded. Recovery Girl watched the monitor. Hana covered her mouth behind the partition. Daichi's eyes were wet. Ren sat. The room exhaled. Aizawa nodded.
"That is the improvement" Ren leaned back, sweat cold along his neck.
"Standing?"
"No. Sitting when useful wanted longer" The words hit somewhere deeper than muscle. Kurose added "Record that" Dr. Seno typed. Ren said "Do not write poetic nonsense" Kurose looked at him.
"That instruction is too late for everyone here" Recovery Girl handed him the nutrition straw.
"Fuel" Ren took it.
"Not obedience" Hana answered from behind the partition.
"Fuel" He drank. The third test should have been delayed. Everyone knew that later. At the time, it looked reasonable because the first two tests had gone better than fear predicted and worse than hope wanted, which meant the room was vulnerable to cautious optimism. Cautious optimism was still optimism. Recovery Girl distrusted it professionally, but Dr. Seno argued the data window was valuable and Ren's vitals remained within the pre-agreed limits.
Aizawa argued the next step should be a stop drill under controlled load because stopping under function mattered more than resting after success. Kurose argued the language was already becoming slippery and they should clarify the emotional objective before Ren tried to turn it into a secret exam. Ren listened to them argue about his body while drinking broth and feeling the pale lines under his skin settle and stir. Hana asked from behind the partition "Ren?" Everyone stopped. Good. His mother had that effect.
Ren looked at her.
"Do you want the next test?" The question entered the room and rearranged the furniture inside everyone's heads. Not "can you". Not "are you ready". Not "the data says". Do you want. Ren looked at the pressure mats. The parallel bars. The low platform. The rescue dummy lying on a padded mat like an insult disguised as future. Want was complicated. He wanted Hero Course. He wanted not to want because of Garaki. He wanted to know what his body could do. He wanted to never learn because learning made it useful.
He wanted to become less removable. He wanted no one to be relieved if he said yes. He wanted everyone to stop looking like his yes would hurt them. He wanted the question to wait. He wanted the door. He breathed.
"Yes" Recovery Girl's eyes narrowed.
"Why?" Ren looked at her.
"To know where stop is" The room held the answer. Aizawa nodded once.
"Acceptable" Recovery Girl looked at Hana and Daichi. Hana's face was pale. Daichi's hand held Bentaro like old wood could keep a father from reaching too quickly. Hana said "I hate yes" Ren swallowed.
"Me too" She nodded.
"Then hate it and choose carefully" Daichi added "And stop if hate becomes fear with orders" Ren breathed.
"Yes" The third test was called Assisted Civilian Stabilization. Ren called it the soft dummy test because he respected language. The dummy weighed twenty kilograms, shaped like a seated civilian with weighted instability in the torso. The task was not to lift it. Recovery Girl had threatened everyone within range when the word lift appeared in an early version of the plan.
The task was to sit in a chair, reach forward with the left hand to stabilize the dummy as it tipped, use controlled bracing through the right shoulder and ribs without standing, and then release when instructed. A rescue hero did not always need to move the world. Sometimes they needed to stop someone from becoming worse until help arrived. That was the theory. Ren sat on the test chair. Harness still attached. Left wrist wrapped. Right shoulder taped. Ribs monitored. Soft bars on either side.
Aizawa stood in front. Dr. Seno at the monitor. Recovery Girl close. Kurose by the stop button. Hana and Daichi behind the partition. The dummy sat one arm's length away. Ren stared at it.
"This is ominous" Aizawa said "It is foam""So was the soft spoon, spiritually" Recovery Girl said "Focus" Ren flexed his left fingers. Pain present. Gate quiet.
"Map""Go""Mobility Room 3. chair. harness. dummy. left wrist. right shoulder. ribs. soles irrelevant. hungry. tired. choosing" Kurose's expression changed.
"Good word" Aizawa looked at Dr. Seno.
"Ready?"
"Ready" Recovery Girl looked at Ren.
"Stop remains yours""Yes" The dummy tipped. Slowly. Controlled. Ridiculous. Ren reached. The left wrist hurt immediately when his palm met the dummy's shoulder. Not sharp enough to stop. Enough to warn. His right ribs tightened as his torso leaned forward. The shoulder tried to brace. Graft Lattice woke at three points at once. Left wrist gate. Right shoulder brace. Rib repair warmth. Too many doors. Ren breathed.
"Left wrist present. shoulder gate. ribs warm" The dummy's weight shifted against him. Twenty kilograms should not have felt like the field. It did not. But it hinted at it. A civilian slipping. A child panicking. A body becoming another incident. Ren's palm pressed into the dummy's foam shoulder. Pale lines rose around his wrist and across his right shoulder, then along the ribs like a thin internal net. The pain at the wrist lowered but stayed. The ribs warmed but did not flood.
The shoulder braced not by becoming strong, but by distributing strain into scar-responsive channels across the upper back. The dummy stopped falling. Ren held it. The room went silent. Not because of the hold itself. Because of how different it looked. Before integration, Ren's body had survived by locking down and paying afterward. Now it adjusted. It routed. It made a structure under stress before collapse arrived. Not perfect. Not safe. But functional in a way that had not existed before. Hero-shaped.
Ren felt it too. That was the wound. Because the hold felt possible. The dummy pushed against him. His ribs flared. Repair Scaffold warmed. The pain gate at the wrist widened. Useful relief offered itself again. Hold longer. Show them. This is what you are now. This is why the Hero Course makes sense. This is why the license could happen. This is why Garaki—"Stop" Ren said The word cut through the room. Aizawa moved. Dr. Seno released the dummy's weight into the support rig.
Recovery Girl guided Ren's shoulder back. Kurose hit the secondary pause even though the main support had already taken over. The dummy settled onto the mat. Ren's hand remained in the air for one second too long. Then fell into his lap. He was shaking. Not collapse. Near enough to teach. Recovery Girl leaned in.
"Map""Mobility Room 3. chair. left wrist. shoulder. ribs. hungry. tired. stopped""Pain?"
"Present""Body map?"
"Present""Panic?" Ren closed his eyes.
"Sad" No one spoke too fast. Hana opened the partition door. Recovery Girl did not stop her. Hana crossed the room and knelt beside the chair.
"Sad is allowed" Ren looked at her.
"It worked" Hana's eyes filled.
"I know""I hate that it worked""I know""I also—" He stopped. Hana waited. The room waited. Ren swallowed.
"I also wanted it to" Hana put her hand on his hair after his nod.
"Both""Always both" Recovery Girl looked at the monitor.
"Vitals high but not stupid" Aizawa said "He stopped before collapse" Dr. Seno's voice was quiet.
"Yes" Aizawa looked at Ren.
"That is the improvement" Ren let out a breath. The words had been said before. This time they fit differently. Not the bracing. Not the hold. Not the useful relief. The stop. The release. The choice to let the dummy fall into the support rig instead of proving his body could keep being useful until something broke. That was the improvement. Kurose stepped forward.
"Record it" Dr. Seno nodded.
"What wording?" Kurose looked at Ren first. He nodded faintly. She said "Student stabilized low-weight rescue dummy under controlled conditions, maintained body map, identified multi-site Graft Lattice activation, and voluntarily stopped before collapse" Aizawa added "No endurance scoring" Dr. Seno typed. Recovery Girl said "Add no combat clearance remains" Dr. Seno typed. Hana said "Add he hated it" Everyone looked at her. She did not back down.
"It matters" Kurose nodded.
"It does" Dr. Seno looked at Ren. He breathed.
"Add subject expressed distress over usefulness of graft-derived function" Kurose's eyes narrowed.
"Student" Dr. Seno corrected immediately.
"Student expressed distress over usefulness of graft-derived function" Ren closed his eyes. Good. Terrible. Good. The test ended there because Recovery Girl declared the room had reached its maximum daily allowance of being impressed. Ren was transferred back into the medical chair with no standing bonus, no extra trial, no "one more", no hidden question shaped like pride. He drank broth, then half a protein drink, then threatened the spoon with formal complaint.
Daichi promised to represent the spoon in arbitration. Recovery Girl rejected the court. The pale lines faded under Ren's skin as the room quieted. Not gone. Waiting. Rules built, not mastered. When Nezu was allowed a report, he read it in the hall outside R-2, not in front of Ren. Kurose stood beside him. Aizawa leaned against the wall. Recovery Girl held the report hostage in one hand even though Nezu had already read a copy. Dr. Seno summarized.
"Graft Lattice can now locally gate pain under conscious stop command. Scar-responsive bracing activates under controlled load. Repair scaffold attempts to support stressed tissue but can be limited by Scar Tissue channels. He maintained body map in all tests today" Recovery Girl added "With fatigue, hunger, fever risk, emotional distress, and zero combat clearance" Nezu nodded.
"Of course" Kurose said "The data supports conditional transfer discussion" Aizawa said "The stop supports it more" Nezu looked at him. Aizawa continued "Before, his heroic behavior often meant staying until adults removed him. Today, he stopped before the room had to" Recovery Girl's face softened for one unacceptable second. She corrected it with irritation.
"That is medically less stupid" Kurose said "Ethically less stolen" Nezu's eyes sharpened.
"Yes" Aizawa looked toward the closed door.
"He is not ready for a field. But he might be ready to train for one" Recovery Girl said "Conditional""Very""Vetoes""Many""No one says he proved himself by almost breaking" Aizawa's eyes narrowed.
"He proved the opposite" Kurose nodded.
"He proved he can stop" Nezu folded his paws.
"Then that becomes the foundation of his Hero Course track" Recovery Girl stared.
"Not endurance""No""Not pain tolerance""No""Not inspiration""Absolutely not" Aizawa said "Control, rescue, withdrawal, body map, communication, consent" Kurose added "And language" Recovery Girl pointed at her.
"Especially language" Nezu smiled faintly.
"A curriculum on not becoming a useful wound" No one spoke for a moment. Then Kurose said "That is horrifyingly accurate" Aizawa looked at Nezu.
"Do not put that in official documents""I would phrase it differently""No" Nezu's smile widened by one dangerous degree.
"Perhaps" Inside R-2, Ren slept for twenty-three minutes and woke ravenous enough to consider the protein drink diplomatically. Hana was still there. Daichi was still there. The signs were still there. The room had not transformed into a training room because of one test. Good. Recovery Girl entered with another tray and a face that dared anyone to comment on how fast food had become the most important part of hero training. Ren looked at the protein drink.
"I will negotiate""No""Harsh opening position""Drink" He drank. It helped. That was annoying. Hana watched him.
"You stopped" He lowered the drink.
"Yes""You wanted to keep going""Yes""You stopped anyway""Yes" Daichi looked at him over Bentaro's handle.
"That sounds more heroic than holding until collapse" Ren stared at the blanket.
"Does it?" Hana's hand found his hair.
"Yes" The answer hurt. It also stayed. Later, after food and vitals and another map check, Aizawa came back alone. He stood at the door until Ren opened his eyes.
"Do you want a report?" Ren considered.
"No numbers""No numbers""Human?"
"Unfortunately" Ren nodded. Aizawa entered. Hana and Daichi did not leave. Good. This was not a secret. Recovery Girl pretended not to listen from the monitor station. That was a lie everyone respected. Aizawa stood beside the bed.
"You demonstrated three things" Ren looked at him.
"One. You can notice Graft Lattice activation before it removes too much information. Not always. Sometimes. That can be trained" Ren nodded.
"Two. Your body can now support controlled rescue-relevant strain that would have destabilized you before integration. Not high output. Not combat. But meaningful" Ren swallowed.
"Three. You stopped before collapse when continuing would have made you look better to people who do not know what they are looking at" That sentence entered him slowly. Aizawa continued "That third one matters most" Ren looked at the left wrist.
"I wanted to keep holding""I know""It felt like proof""Proof of what?" Ren closed his eyes.
"That I belong through something other than being taken" Aizawa did not answer immediately. Good. Then he said "Belonging is not proven by damage" Ren laughed once without humor.
"Common theme""Then learn it" Ren opened his eyes.
"Hard""Yes" Aizawa leaned back slightly.
"If you enter the Hero Course, your first rule is not win. It is not endure. It is not impress anyone who expects a tragedy with better posture" Ren almost smiled.
"What is it?"
"Return with a body map" Ren stared. Aizawa's voice stayed flat.
"Every exercise. Every scenario. Every rescue simulation. Every exam if you get that far. Return with a body map. If you cannot, you withdraw. If you refuse, I remove you. If you hide it, you lose training access" Ren breathed. The rule felt harsh. Good. Harsh meant real.
"What if someone needs help?"
"Then you communicate before you disappear into usefulness" Ren looked away. Aizawa said "Heroes who vanish into usefulness become hazards eventually" Ren hated that sentence too. It was becoming a crowded category. He whispered "Return with a body map" Aizawa nodded.
"That is your first Hero Course condition" Ren looked back at him.
"Do I have conditions for the course?" Aizawa's eyes sharpened.
"Good question" Ren waited. Aizawa said "You should" The thought had not occurred to him cleanly. He could have conditions? Not just receive them? Aizawa watched the realization land.
"You are not a prize. You are not a rescue dog being moved to a better kennel. If you transfer, you set conditions too" Ren swallowed.
"Stop means stop""Yes""No endurance scoring""Yes""No public explanation of Graft Lattice details""Yes""No one calls it upgrade" Aizawa nodded.
"I will expel the word if necessary" Recovery Girl called from the monitor station "I will do worse" Ren breathed.
"No using fragments as class resource" Aizawa's face hardened.
"Yes""No asking Shinso to solve panic unless he volunteers and it is authorized""Yes""No comparing our acceptance as target value""Yes" Ren closed his eyes. The list made the door less like a trap. Not safe. Less like a trap. Aizawa said "Write them when you can sit up without annoying Recovery Girl" Recovery Girl shouted "He annoys me at all angles" Aizawa ignored her. Ren whispered "Student conditions""Yes""Disgusting phrase" Aizawa's mouth twitched.
"Good phrase" Ren looked at him.
"Hero Course on probation""Everything is on probation" Ren nodded. That felt correct. The first controlled use of Graft Lattice did not end with applause. It ended with Ren asleep under medical observation while the adults outside began rewriting an educational plan around the strangest possible foundation. Not power. Not victory. Not endurance. Return. Stop. Map. Choice. Those words did not look like a hero on a recruitment poster. They would not fit under a headline.
They would not satisfy people who wanted Quirks to announce themselves with fire, explosions, ice, gravity, tape, engines, or the bright obviousness of power. But a rescue field did not care what looked impressive. A collapsing room cared who stayed useful without becoming another casualty. A trapped civilian cared who could speak calmly while pain tried to become panic. A damaged body cared who knew when to stop before help became another wound. Ren Akiyama did not look like a powerhouse.
He looked like someone the field could no longer remove easily. And for the first time, that difference did not belong to Garaki. Garaki had made grafts. Scar Tissue had made rules. Ren had said stop. That was where the training would begin.

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