He doesn't respect his boundaries either lol he downright forced him to have sex
In chapter 43? Seems like the mc didn't straight up reject him, I mean it didn't involve physically forcing him to have sex, seems like the top just got his way by seducing the mc, +I'm pretty sure if the mc was opposed to it he would've rejected the offer of "taking it to bed" in the first place, the black haired dude on the other hand..
Having to convince someone to have sex with you is not consent. There's no other option open than to just say yes. It's the illusion of choice that seunghyun uses to then still end up taking advantage and to sort of manipulate the MC. So let's be honest they're both not the greenest flags but hey it's just a pornographic manwha where men fuck eachother so who tf cares ╮(￣▽￣)╭
it's obvious who'll be the the one getting rejected, it's always the ones who respect the MC's boundaries smh