He scoffs; Shinjirou had plenty of opportunities to carry out that threat already, and each time, he had just obediently opened his mouth and let him go as deep as he wanted.

But he can't back down now, even if he wants to. Which he doesn't.

"Someone brought a little virgin. Maybe I'll go fuck her later, I think she's a little busy right now." He grabs at Shinjirou again, by the hair this time, and aims a kick at his ribs. "And I can't leave unfinished business hanging here."