The headache from the previous day had settled into a dull, dry ache behind Megumi's left eyebrow by morning.
When he walked into the library, Jinya was already sitting at the table. A pair of padded canvas arm-guards rested on the floorboards beside his knees.
"Sit," Jinya said.
Megumi took the cushion across from him.
"Yesterday you learned to cage a room," Jinya said. "You learned how to spread the quirk outward and hold a target. But an enclosure does not make you durable. If an enemy breaks through your bind and closes the distance, you are still made of ordinary meat."
"Jin'ichi taught me how to redirect hits," Megumi said. "And I can hide in shadows to avoid getting hit entirely."
"Jin'ichi taught you how to move your bones so you don't snap them against someone larger," Jinya replied. "That is technique. It does not change the density of your muscle. And your shadow technique requires two things: you must react to the attack in the first place, and there must be enough time for gravity to pull you into the shadows. What happens when you face an opponent too fast for either? When you summon Max Elephant, your quirk produces thousands of pounds of compressed mass and water. When you summon the great serpent, you produce tons of muscle. Yet when you throw a punch, you use nothing but your own body weight."
Jinya rested his right forearm on the table, palm open.
"Where does the shadow come from?"
"My quirk," Megumi said. "My body."
"Then stop throwing all of it into the room," Jinya said. "Watch."
The skin of Jinya's forearm darkened. It wasn't an explosive flash or a heavy shell of armor. The color of his flesh simply shifted to a deep, matte charcoal, the shadow sinking directly into the skin and pulling tight over the tendons and bone. The muscle looked slightly denser, but the shape of the arm remained unchanged.
"Hit it," Jinya said.
Megumi planted his feet on the mat and threw a straight right punch into Jinya's forearm.
The impact made a dull, heavy thud.
A sharp shock shot straight through Megumi's wrist and elbow. Jinya's arm hadn't budged. It felt like punching a block of steel.
Megumi pulled his hand back, flexing his aching fingers. "You pulled the mass inside."
"I reinforced the surface," Jinya corrected, releasing the tension. The charcoal hue faded back to normal skin. "You do not build thick armor over your flesh. A thick layer slows your joints and wastes energy. You sink the shadow into the surface of the muscle. You brace the bone from the outside and the tendon from the inside."
"Right arm only," Jinya instructed. "Do not let it leak through your boots. Pull the shadow upward from your center, channel it down the shoulder, and stop it at the knuckles."
Megumi closed his eyes and reached for the cold reservoir in his gut.
Instead of letting it drop toward the floor, he pulled the sensation upward. It felt unnatural, like drawing heavy liquid through a narrow pipe. He dragged it past his collarbone, pushed it down the bicep, and wrapped it around his forearm.
His right arm turned jet-black. A thick, smoky vapor began curling off his knuckles.
"Too thick," Jinya said immediately. "Try to bend your wrist."
Megumi tried. His wrist moved sluggishly, the dense mass of shadow resisting the natural flex of his tendons.
"Disperse half of it," Jinya said. "Tighter. Pull it against the skin until you can see the outline of your veins again."
Megumi exhaled and pulled the excess darkness back into his core. The vapor vanished. The black thinned to a matte slate gray, clinging to the skin like a second layer of tight dermis. His fingers felt heavier, but when he opened and closed his fist, the movement was smooth.
"Better," Jinya said. He raised his open palm. "Strike. Don't push through it. Brace the reinforcement on contact."
Megumi stepped in and threw a right into Jinya's hand.
He misjudged the timing. He tensed the shadow a fraction of a second after his knuckles made contact; the force deflected awkwardly off Jinya's palm, and the resulting shock vibrated violently up Megumi's forearm, shattering the reinforcement instantly.
Megumi hissed through his teeth, shaking out his throbbing wrist.
"You tried to punch, and then you tried to reinforce," Jinya said without lowering his hand. "The reinforcement is the strike. If you tense after the hit, your bone has already taken the damage. Again."
Megumi reset his stance. He drew the slate layer back over his arm, feeling the cold lock tight over his knuckles and wrist.
He stepped in and drove his fist straight into Jinya's palm.
Crack.
The sound was sharp and dry. Jinya's hand held firm, but his shoulder rocked back half an inch, and his rear sandal slid an inch across the floorboards.
The backlash hit Megumi immediately. The reinforcement held through the impact, but the violent shockwave tore the layer apart a moment later, kicking the displaced force straight back into his chest.
Megumi took two steps back, breathing hard, his right arm humming with a deep, vibrating ache.
"You held the structure through the hit," Jinya said. "Now bring it down into your legs and torso. If you only reinforce the limb you strike with, an opponent will simply break your ribs while you admire your own hand."
...
They spent the next hour expanding the coverage.
Megumi learned quickly that reinforcing his torso required a different kind of balance. If he pulled the shadow too dense around his chest, his ribs couldn't expand to draw breath; if he left it too thin, a simple palm check from Jinya drove the wind straight out of his lungs.
By midday, Megumi could coat his forearms, shins, and chest in a thin, uniform skin of slate-gray shadow. His movements were slightly stiffer than normal, and maintaining the internal pressure caused a steady, hot throb to build in his temples, but the frame held.
Jinya stepped back to the clear center of the room and picked up the canvas arm-guards, sliding them over his forearms.
"Put your hands up," Jinya said.
Megumi raised his guard, drawing the shadow across his arms and chest. "We're sparring?"
"A stationary target teaches you nothing about timing," Jinya said. "Move."
Jinya stepped in without warning.
His movement was compact and remarkably fast for a man his age. He threw a heavy, straight left aimed directly at Megumi's sternum.
Megumi crossed his forearms to block.
The impact hit like an iron bar. The reinforced slate layer on Megumi's forearms absorbed the initial shock, but the sheer kinetic weight drove him back two paces, his boots squealing against the wood. Before he could reset, Jinya followed with a low, sweeping kick aimed at his lead knee.
Megumi dropped his weight, reinforcing his shin just as Jinya's shin collided with his.
The impact made a sharp, wooden crack. Pain flared bright along Megumi's tibia, but the bone held. He used the momentum of the block to pivot, snapping a reinforced right straight toward Jinya's jaw.
Jinya leaned back just enough to let the knuckles graze the air, caught Megumi's extended wrist with his left hand, and drove an open palm hard into Megumi's ribs.
The strike landed clean. Megumi's torso reinforcement took the brunt of it, preventing the ribs from cracking, but the force lifted him off his feet and sent him rolling across the floorboards.
Megumi scrambled up immediately, breathing in short, ragged gasps. The slate gray across his ribs had shattered, leaving a hot, bruised ache under his armpit.
"You are only reacting," Jinya said, advancing at a measured walk. "You brace where I hit, and you lose the rest of your body. If you fight like that, anyone with basic combination striking will dismantle you in four exchanges."
"You're faster than you look," Megumi muttered, pulling the shadow back over his torso.
"And you are relying entirely on defense," Jinya said. "Use what you learned yesterday."
Megumi took a sharp breath.
He kept the reinforcement wrapped tightly over his arms and chest, then reached down toward his boots, dropping a pool of shadow across the floorboards.
The mental strain was immediate and severe.
Trying to project the shadow outward across the floor while simultaneously compressing it inward over his own muscles felt like trying to write two different sentences with both hands at the exact same time. The slate-gray layer on his forearms flickered, thinning out, while the dark pool on the floor rippled unevenly.
Jinya stepped forward again, throwing a hard one-two combination to test his guard.
Megumi blocked the first jab with his left forearm, parried the second with his right, and clamped down on the floor shadow beneath Jinya's lead foot.
The dark snapped tight around Jinya's ankle.
Jinya's forward momentum hitched for a fraction of a second.
Megumi seized the opening. He stepped in hard, drew the reinforcement tight over his right fist, and drove an uppercut straight toward Jinya's solar plexus.
The strike landed solid.
The reinforced blow drove into Jinya's midsection with a loud, heavy thud. Jinya's breath escaped in a short grunt, his torso rocked back, and his rear foot dragged two inches across the floorboards.
It was the cleanest hit Megumi had landed all week.
Before Megumi could recover his stance, Jinya reacted.
Ignoring the pain in his midsection, Jinya drove his weight forward, breaking through the ankle bind with raw force, and hooked his right arm over Megumi's extended shoulder in a tight, violent clinch.
"Now hold both," Jinya growled.
Jinya drove a short, brutal knee straight toward Megumi's liver.
Megumi panicked. He tried to reinforce his flank to take the knee while simultaneously expanding the floor shadow to catch Jinya's supporting leg.
His focus split right down the middle.
The floor shadow tore apart instantly, dissolving into gray vapor. The reinforcement across his ribs collapsed a split second before the knee connected.
The strike hit home with full force.
The impact knocked every scrap of air from Megumi's lungs. His vision flared white, his stomach convulsed violently, and he hit the floorboards on his side, sliding until his shoulder bumped against the lower bookshelf.
Megumi curled into a tight knot, clutching his side, coughing and gasping for breath that wouldn't come. His ears rang with a high, piercing whine, and a wave of sharp nausea rolled through his gut.
The library was quiet except for the sound of his ragged choking.
Jinya stood three paces away, resting a hand on his own midsection where Megumi's punch had landed. He exhaled slowly, adjusting his robes.
"Get up," Jinya said.
Megumi managed to roll onto his stomach, pushing himself up onto his hands and knees. His ribs throbbed with a sickening, bruised heat, but when he drew a shallow breath, nothing clicked or scraped. The bone was intact.
"You managed one exchange," Jinya said, walking over to the table and setting down his arm-guards. "You held the reinforcement, pinned my foot for half a second, and delivered a strike that actually carried mass."
Megumi spat a mouthful of saliva onto the floor and slowly dragged himself up until he was sitting against the shelf. "And then I lost."
"Because you tried to run two full-output techniques on raw conscious effort," Jinya said, pouring a cup of water and setting it on the floor within Megumi's reach. "Your mind cannot manage an external trap and an internal reinforcement at maximum power simultaneously. Not yet. The reinforcement has to become reflex. It must sit on your skin like breathing, so your conscious mind is entirely free to command the room."
Megumi picked up the cup with trembling fingers and took a small sip. His throat burned.
"How long does that take?"
"Months of daily repetition," Jinya answered bluntly. "You will not master it by tomorrow morning. But you now know what the technique actually feels like, and you know why you failed."
Jinya sat back down at the low table, his face returning to its usual impassive expression.
Megumi leaned his head back against the wooden shelf, closing his eyes against the throbbing pressure behind his brow.
His side ached, his arms felt like lead, and his throat was raw.
The rest of the day blurred into a relentless cycle of movement and correction. Jinya drilled him through the same sequences again and again, until muscle memory began to override conscious thought.
They sparred in short bursts, Jinya's strikes coming faster each time, forcing Megumi to react rather than think.
By the time the sun began its descent, painting the training hall in amber light, Megumi could barely lift his arms. But he'd landed three clean hits. Three more than yesterday.
...
Later, alone in the small guest room they'd given him, Megumi sat on the edge of the futon and stared at his hands. The knuckles were scraped raw, already beginning to bruise.
The Zen'in compound was quiet at night. No distant traffic, no city hum. Just the occasional creak of old wood settling and the whisper of wind through the courtyard.
He thought about the invitation, about the weight of the Zen'in name and all it carried.
He thought about Tsumiki, lying silent in her hospital bed. About the life he had now. Small. Uncertain. His own.
Then he thought about the shadow beneath his skin, that patient, waiting thing that had finally begun to feel like his. About what Jinya had said at the end of their training session.
"These last two days are just a glimpse of what awaits you if you join the Zen'in."
Power. Legacy. Purpose.
Or freedom. Distance. His own path.
Megumi lay back on the futon, staring at the ceiling beams disappearing into shadow.
He didn't know yet. But he'd have to decide soon.
...
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