Youta is a pure Chad, in a way. Going full S, I like it.
And yeah, we need to go down that road. New world, new rules. That's something protagonists AND readers need to get through their hard skulls. "Ew, she's 15, pervert". Uh...is she legal in that world? Then no problem.
"You have sex with someone you like". First: wrong. Even in our world there's prostitution, and there are/were political marriages, and revenge sex, and...
Second: in the new world, he's LITERALLY the only man in the world. Ofc they'll like him. They'll want sex even if they don't.
It's fine to turn them down if HE doesn't like THEM. But pushing the values of "no, you need to like me and get to know me first" is just stupid.