The ending ruined it for me tbh. I don't mnd them being together but not in a "oh yeah we can move on happily" but the toxicity that it is, both of them forever being in that irreparable mess, or either/both of them dying. Don't really like the whole "ahh happy ending we all moved one and grew from the experience" as if it was some regular challenge in life, like boy. Seongho kidnapped, beat and r*ped Dohyun repeatedly traumatizing him for life. Dohyun as a kid was manipulative towards Seongho and pressured him into sex by doing this "pull away" tactic and trying to see what Seongho would do for him in return to show his love. (And just to be clear one is not on the same magnitude as the other). This is one of the things not even therapy can ever fix.
I haven't stayed up in a while to finish smth and it wasn't worth it but i guess this was considered good back then, i haven't really had to chance to properly read it until now.