Responses

Idk about that, usually when you're intimate with someone you can catch feelings easily (it depends on the person obviously), it happens often with sex friends or even friends that are intimate with one another. To me it looked like he was starting to develop feelings, but they weren't as strong as his friend's, he's liked him for a while after all
It would've been better if they didn't end up dating, at least for now. The friend suddenly liked Jisoo in a romantic way because they kissed and had sex? That can't be possible. They date now but I think the friend will continue acting like a friend towards Jisoo since he hasn't really thought about it deeply. Although they say that feelings develop in the long run, I wished they dated when both feelings they have for each other are sure and the same since they'll only end up hurting each other. As you know the drill! Slowly, but surely!