Idk why you guys are so surprised. This has the psychological tag with the mafia setting on top of that. Of course at least one of the the characters is gonna be fucked up and there's bound to be toxicity. Not saying it's right but did you really think it was gonna be all rainbows and butterflies after their first hookup?
Of course I'm not stopping you from expressing your opinions about the characters, etc. You can freely express your dislike or disapproval for the characters or their actions. I've seen criticisms regarding the seme's actions and they're fine because it IS fucked up. But some of the comments here make it sound like they never expected the characters to not do a sudden 180 from what their characters are like as a whole, completely ignoring the theme and the pace of the story, and make it sound like it's not supposed to progress this way because it didn't turn out like how it does on non-psychological yaois. I'm sorry but that's just forcing development and your ideals to the story.

Idk why but it becomes more toxic the more chapters come up and the sex scenes make me uncomfy,, taesung successfully manipulated him into becoming dependent on him