Maybe when the sexting fic is done I can get back to this one (the continuation to the voyeurism thread fic):

Sukuna flicks two of his fingers in Yuuji’s direction, and the small cloud of energy blows into his face before the brat can react.

A small gasp slips past Yuuji’s lips when it reaches him, and he inhales most of it in one go.

His breath deepens instantly. “What… what was that?”

“Just a little encouragement.”

Yuuji’s eyes go wide. “For what?”

Sukuna smirks. “Nothing you don’t already want.”

“I don’t want… what you said.”

“Hush, brat,” Sukuna says softly. “This is exactly what you’ve wanted ever since I told you how to touch yourself the first time.”

“It isn’t.”

He still sounds determined but he’s already panting, and the bulge in his underwear has grown.

Sukuna’s smirk widens. “Yuuji - come here.”

He takes two, stumbling steps closer and stops. Stubborn brat.

“Closer,” Sukuna says.

Yuuji moves again, bare feet slipping over bones as he approaches. His eyes are half hidden by his lashes and his mouth is slightly open, each breath more labored than it should be. When he stops in front of Sukuna, the pointed glare has softened into a look of longing.

“Good,” Sukuna tells him, and Yuuji lights up a little. He’s not unaffected by praise, that much is clear. “Now - kneel before your ruler.”

A hint of defiance sparks in Yuuji’s eyes, but it’s quickly dulled by arousal, making his eyelids droop even more.

“Sukuna… what the hell did you do to me?”

“Don’t question me, brat,” Sukuna says, his voice a lot more firm than before. “I said kneel.”

Yuuji’s knees hit the bones with a crack and a rattle.