I see it pretty differently, I think it's quite accurate to what a human would feel in that situation (or at least what I'd feel, so much is happening so they'll get overstimulated and confused.)
Yuta probably DOES like him even if it's a little bit because of his denial of liking the peaceful break Seunghyun gave him, though some of the dramatic lewdness is probably an act to try and win him over to get his revenge in the later run. Keeping his inner monologue a secret helps with confusing the reader, otherwise the story would be too predictable (unless the author just genuinely has no idea where to go with this.)
Seunghyun probably likes Yuta too, even if it's just "oh, he doesn't really deserve this life." than actual love. You gotta remember that Seunghyun was dragged into this line of work when he was 11 years old, he knows next to ZERO about emotions and relationships. His entire life is kill, business and whores. He thinks this stuff is normal, which is why he's such an asshole. Plus with his internal homophobia, he'll just instinctively find any excuse to convince himself he doesn't like Yuta (making him convinced that he hates him instead because he's frustrated with his feelings).
i’m so confused. yuta likes him? he’s acting? it’s part of his revenge? i can’t figure it out cause the author gives like 3 lines of inner monologue for him.
and then seunghyun: he feels guilty for raping him? guilty for leaving him? no guilt at all? he keeps showing guilt but then teasing him about being a whore and liking getting raped and telling him he’s worthless and should cut his dick off or smth but then is mad when he does it? he gets protective and is taking care of him but he also is raping him and literally treating him like trash. idk man i think the author is just writing whatever so they can make rape scenarios