Alpha Yuji who is upset with his twin alpha sukuna who keeps sleep around and having close calls with omegas. It’s one thing to be dating them, but if he’s being reckless and almost getting accidentally mated every time, Yuji has to do something as the responsible son.

Cue Yuji tying him up, drugging him and forcing him to fuck and knot a sex toy over and over as punishment for being horny bastard of an alpha.

It drives sukuna wild to see yuji covered in his cum, marking his territory, and awakens the sleeping brocon in him.

Afterwards he starts acting possessive and territorial over Yuji, becoming even worse when he hangs out with non-betas. So he manipulates Yuji into giving him handjobs regularly, he gets off on his knotting in Yuji’s hands, and wants Yuji to sit on his face but can’t man up to beg for it.