The clinic smelled like cheap antiseptic and the kind of coffee that gets made at 6 AM and reheated twice.
Izuku sat on the examination table watching a tired woman wrap his forearm in a pale blue cast. She had the efficient hands of someone who'd done this a thousand times and the expression of someone who'd rather be doing it zero more.
"Clean break," she said. "No heavy lifting for six weeks. Understand?"
'Lady, if you knew what broke this arm, you'd have me in a psych ward.'
"Yes, ma'am."
She gave him one last look. The kind that said I don't believe you but I don't get paid enough to argue. Then she sent him home.
He walked in silence. Right arm in a sling. Every step sent a dull throb up through his radius and into his shoulder, a steady beat reminding him that he'd fractured his own bone by looking at a dead fish too hard.
'Okay. Math time.'
Whatever was living in his chest — the Shadow Monarch's power, the necrotic mana, whatever the hell you wanted to call it — was massive. Ocean-sized. And his body was a paper cup.
One dead fish for three seconds had snapped his radius.
Which meant his current capacity was somewhere around zero-point-nothing shadow soldiers before his skeleton started filing complaints.
'So the power isn't the problem. The body is the problem.'
He needed mass. Density. Bone that didn't crack under magical pressure and muscle that could absorb the drain without shutting down.
Not quirk training. Not martial arts. Just heavy, brutal, stupid weightlifting until this body stopped being made of glass.
'Six weeks in a cast. Then I start.'
He turned the corner onto his street and barely got the front door open before Inko hit him like a guided missile.
"Izuku!"
She had his shoulders before he could get his shoes off. Eyes red, puffy, mascara streaked down both cheeks. She'd been crying since the school called, probably. Maybe before that. She seemed like the type who cried preemptively.
"What happened? The school said you fell — why didn't you call me? Are you okay? Does it hurt?"
Her voice cracked on the last word.
Izuku looked at her.
Really looked.
Small. Soft. Green hair like his, but lighter. Hands still gripping his shoulders like he might disappear if she let go.
This woman loved her son. Loved him with the kind of desperate, protective intensity that made his chest hurt in a way that had nothing to do with necrotic mana.
Her son was gone.
Some 22-year-old from another universe was wearing his face and she had no idea.
'Don't think about that right now.'
"I'm fine, Mom."
It came out steady. Calm. Nothing like the boy she'd raised.
Inko blinked.
"It's just a fracture. Clean break. Six weeks and I'll be good as new."
"But—"
"I tripped near the koi pond. Stupid accident. That's all."
He gave her a small smile. It felt like putting on someone else's clothes.
She stared at him. Confused. The way a mother looks when her child comes home speaking a language she's never heard before.
"Are you... sure you're okay?"
'No, Mom. I died. Got reincarnated into your son's body in a world where people punch buildings and a guy with a bird head is somehow a viable hero concept. Your son's gone and I'm what's left and I'm sorry. I'm really, really sorry.'
"Yeah. I'm sure."
He walked past her toward his room.
"I'm gonna rest for a bit. Down for dinner."
He could feel her watching him the whole way down the hall. Confused. Worried. Reaching for something she couldn't quite name.
Something tightened in his chest. He ignored it. He'd get good at ignoring it.
He closed his bedroom door and locked it.
***
The room was a shrine to someone else's childhood.
All Might posters. Action figures. Stacks of hero analysis notebooks filling an entire shelf, each one numbered and color-coded with the obsessive care of a kid who'd poured his whole heart into studying greatness because he couldn't have any of his own.
Izuku stood in the middle of it and felt like an intruder.
'Because you are one.'
He crossed to the mirror on the closet door and pulled his shirt off with his good hand.
'Oh. Wow.'
He was skinny. Not lean, not wiry. Skinny in the way that made people hold doors open for you out of concern. Ribs visible. Shoulders narrow enough to slip through a cracked window. Arms like someone had stretched skin over broomsticks and called it a day.
'This is what I'm working with. A body that looks like it apologizes for existing.'
He pressed his good hand against his sternum. The cold pulsed underneath. Patient. Vast. Completely unconcerned with the fact that its vessel was built out of wishes and skim milk.
'Alright. Step one: don't die from my own power. Step two: build a body that can actually use it.'
He grabbed a blank notebook and a pen.
At the top of the first page he wrote one word: IRON.
No shortcuts. No quirks. Heavy compound lifts. Deadlifts, squats, overhead press. Tear the fibers down, eat until he was sick, sleep, repeat. Force this body to grow or break it trying.
He looked at the cast on his arm.
'Upper body is out for six weeks. Fine.'
A cold smirk pulled at the corner of his mouth.
'Good thing I don't need my radius to squat.'
He sat on the bed and stared at the ceiling.
Somewhere behind his ribs, the cold presence waited.
It was always waiting.
TO BE CONTINUED