The author doubled back on that night either before or after showing their relationship prior to it. Long story short, Hosik actually did like sunbae as more than a friend, but by the time he realized it, he began pushing sunbae away to avoid being judged for being romantically close with a man. Sunbae was determined to chase him. That night of drinking, Hosik confessed his feelings and sunbae kissed him. He was okay with the bedroom events until after he passed out and woke up panicking.
Things that weren't really said but is a thing: despite their cute love life, sunbae is a yandere. He settles down a bit over time after Hosik complains about his ways and after that point, sunbae only gets crazy when Hosik is pregnant (again).
In a Q&A, people have asked if they ever had interest in the same sex before and how was sunbae like in his previous relationships before Hosik. The author said both are originally straight and still don't see the same sex the way they see each other and that sunbae was normal in relationships with women before Hosik. Which means that Hosik, his destined partner, flipped a switch in him (they are destined partners through the red string of fate)
i read the first chapter thinking it was gonna be cute little story about how a gay dude finds out he’s preggers with a one night stand. turns out it was his r*pist of a sunbae instead and the worst part is that aside from the handful of those with an actual moral compass that read bl on a basis of good plot and not just the fetishization of gay men, most post i saw were completely fine with the obvious rape in this.
i understand (although i hate to admit it) that dubcon is usually an obvious go to for most bl comics. however, this guy was flat out drunk and no matter what way you look at it, that sunbae of his was giving him drink after drink with clear intentions of hoping he passed out. otherwise, what? cause in none of those panels did i see the sunbae drink more than one cup (if that??)
i got to chapter four and realized i just couldn’t deal with this mess. the so called friend basically flipped between telling him there’s no way a guy would want to mess with him cause he’s ugly, to basically not caring at all aside from saying he’d deal with it? anyway, yeah wasn’t a fan.