Okay, so there’s the obvious route here–Which is that Gojo hops in there, teases him about it, and then fucks him immediately, but let me propose an alternative situation!

I think it would be interesting if Gojo wasn’t expecting Yuuji to be attracted to him, so when he hears the kid moaning his name, he’s shocked. It’s not a surprise that someone would find him attractive, he’s Gojo Satoru of course, but Yuuji? The cute, pure, innocent Yuuji? Gojo is so used to people being into him that he never considered his own feelings. He compartmentalized the very concept that he could have a crush on someone, so when it’s reciprocated? It’s just a lot for him to handle. I’d like him to get flustered for once!
(He’d still tease Yuuji about it later, once he gathered his emotions lol)