My point is clear. Yahwi is a dick for treating Jooin as if he's made to be his sex toy, and Jooin is blind to all of Yahwi's insensitive and toxic attitude because he likes him.
That was my point, I never talked about consent like what you brought up since I clearly understand myself that Jooin likes the sex and he likes the sex blindly because he admires Yahwi, and Yahwi just goes with it because of his sexual desires.
Jooin is being treated poorly by Yahwi, but after numerous times of doing it, he's still a total simp for Yahwi. Their relationship is toxic since Jooin is thinking that maybe it's going to bloom into love, but Yahwi, apparently he's not thinking like that at all, therefore leading Jooin on and he knows that well.
But we don't even know that much about Yahwi, we know a lot more information of Jooin than Yahwi (although not everything at the moment), we don't know Yahwi's past or anything plus in the latest chapter he kinda acts sus and kinda sad when Jooin says that he wants to know about him and also when he also said ''but you act like you want to talk about it'' It really isn't fair to say stuff about Yahwi or really anyone else yet unless you know him/them properly, which we don't, 'cause he could have some messed up past or smt. Plus I don't get how Jooin is being treated poorly by Yahwi, I see this as they are basically just ''sex partners'' although I know Jooin tries to hide his feelings about Yahwi instead of just coming out and telling him...I don't get how this is toxic anyways, they're probably gonna end up together in like a couple more chapters tbh and you can even look at the front cover of the Manga. I've read a lot of Manga's like this and if y'all gonna start judging at the start you're definitely gonna be in a surprise by the time this manga ends (and this is ust experience from other manga's I've read) Anyways aside from experience I think that Yahwi might be in denial or cares for Jooin and I really want to know his past as he said to Jooin ''I just dont want to talk about it...How I came to know you.'' I don't get why everyone calls him a ''dick for treating him like this'' I've seen other manga boys treat boys way worse then this and no one ever calls them out plus Yahwi is just being a little cold, he hasn't recently done anything major for y'all to start calling him this..Anyways omg I didn't know I wrote so much, you don't have to the read it all and sorry if some parts don't make sense, I literally just woke up like an hour ago haha.

Yahwi is really a dick. Jooin is worse for being blind and dumbfounded by how Yahwi treats him like a sex worker.
Let's not give Jooin a love interest for being old enough to be a college student but not knowing about how to sense a future toxic relationship.
Let's spare Cain from Yahwi's toxicity and Jooin's stupidity. Cain deserves a ton better than Jooin.