Chapter Text
It started around the second or third finger. Since then he’s been dividing his concentration between suppressing the changes and actually training.
It’s easy to dismiss the growth spurts.
“He's still a teenager after all”
His teeth looking quite a bit sharper.
“I’ll have to see about braces after the goodwill event”
The second pair of eyes opening but the irises are gold not red.
"Sukuna must be changing up his look."
After Shibuya, he stops trying to pretend he’s still human.
He’s taken too many fingers and lost too much to waste energy trying to smother the new parts of himself. Most days he just puts a hoodie on, but whenever the curses he and Choso have stalked turn particularly vicious he’ll usually go bare-chested. The lines of red ink have gotten bolder in the weeks spent apart from his classmates. The insignia of the King of Curses give even mindless curses pause.
Sometimes he feels guilty for forcing Choso to make so many stops. They scavenge every pharmacy they pass for pain relievers.
He doesn’t remember if his first set of teeth hurt this much coming in, but the ones in his stomach are erupting all at once. And they’re so much bigger.
“It’s fine.” Choso tries to reassure him again and again.
He’ll offer up vague memories of going through the same thing with Eso’s back. It’s comforting but it’s not enough to assuage the fear that’s building around what’s to come. His shoulders are starting to swell and ache. The skin around the left side of his face is getting rougher.
Even in his sleep, he can’t really escape the changes. Sukuna used to pull him into his domain once in a while to ridicule him or rend his flesh apart. But now, every night he finds himself in the king’s lap.
Sukuna coos over his form like he’s watching a work of art in progress. Yuuji’s so tired these days that the warm hand running through his hair and the quiet lapping of the domain’s waters are cherished relief from the pains of the day. More and more he finds himself loose-limbed and pliant for him. Yuuji indulges Sukuna as he combs through the hair at the back of his neck, checking to see if the markings are coming along there as well.
Yuuji sighs as his hands work along the muscles of his back and shoulders, feeling for the new bones sprouting there.
“Shouldn’t be much longer. You’ll have to be careful when your finger bones start doubling. Your hands will be useless for a few days.” He muses.
Yuuji just nods vacantly. His breath hitches when Sukuna's hands move down to his stomach. His fingers work the fissure in his abs open to reveal the growing maw inside.
It’s so strange.
Yuuji can taste the earthy tang of his fingertips as they pass over his second tongue. The click of Sukuna’s nails as he counts each new fang echoes through the domain, and Yuuji’s not sure which mouth of his is humming contentedly from the ministration.
“You're taking the changes so well, brat. I’m pleased you’ve finally decided to be receptive.”
“It hurts, though.” Yuuji whines.
Sukuna just clicks his tongue. “Of course it hurts. You tried to hold back all this for months. Now you have to make up for lost time.”
When all is said and done Yuuji will enjoy being remade in Sukuna’s image.
Whether he wants to or not.