Mind you the way it's written predisposes folx to sympathize with Taehon. (And dick gobbling as Sejun's immediate response is truly a bad/ridiculous writer decision please lol.) But what's not clicking? Taehon was involved in the murder of one parent and the permanent disabling of another even if it was as a helpless pawn. Is Sejun supposed to get over that in 5 minutes? Do your parents hate you that much that you can't figure out why Sejun is angry and thoughts of "he was a child" aren't particularly helpful in his processing of this traumatic reveal? Is it that difficult to discern how unmoored he feels in learning that the person who helped him escape his deceptive, manipulative cousin was also actively deceiving him in turn? (Which is why he has put things back on purely transactional terms.) That indeed he was connected to the circumstances that placed him in that abusive situation. From his pov this is a fucking horror show he can't escape. The writer isn't actually giving this development the weight it deserves...which is exactly why you're all annoyed and mad at Sejun (also you too are dick addled) so...nevermind. Carry on lol. Boo Sejun you hor. (●'◡'●)ノ
Folx expectations of characters acting like "mature adults" and acting like "real human beings" always come off as incredibly naive to me. Have you stepped outside and looked at the world lately...? Don't you have friends? Or just exist among different human groups. I wonder if you realise that if your own lives were made into a webtoon how contrived and "immature" and stupid many of your actions would seem to the reader. (I know mine would. But also he's got crazy untreated trauma and history of abuse. Of course, his decision making skills are whack.)
From a different angle, sometimes I think those kind of critiques make sense and sometimes I wonder if we don't realize how completely bonkers these plots are and the line we draw on what's "contrived" is hilarious . If Sejoon was the sensible adult human mature wisdom titan there's no way he should have allowed some random mafia dude to take over his life in the first place...and certainly *after* the reveal he shouldn't ask for *time* he should maybe plan to leave the country to escape all these obsessive psychos, one of whom takes a pledge of love to 5 year old seriously.
I do agree on some part but it's important to not forget, this is fiction, an imaginary story, do not expect to see "reality" in those stories because you will find none. Even if you put reality in those stories it's gonna be somehow boring, yes the plot is "whack", yes it's annoying and frustrating sometimes but do not expect that can not be done.