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If it wasn't for the trope (I need you, please comeback to me even if I was a jerk trope), I would probably drop this. The ML gives me the FULL ICK ಠ,_」ಠ I've read a fair share of stories involving walking red flags but this guy just emits more of it. I get that it's your 'wife' but that doesn't mean that you are entitled to be her husband once again. And his advances to the FL? Unbelievable.
In addition, the way he used his brother? I mean, yeah sure it's given that most historical fiction has that kind of scenario but bro it's been a while since you get to see your brother (bcs of the cross-dimension and the psycho allegations). I thought that you're going to reunite and bond with him (´;ω;`). I felt really sad. BUT I'm kinda looking forward for the lil bro revenge arc (if there is, I hope there is) especially since he is kind of drawn to the FL and now hurt with his brother (aka ML).
I know that the ML had been hurt (betrayal and confinement**) which altered his personality (cause that's how I see it), however, is it wrong to think that I want to make him more hurt than he has been? (๑´•. • `๑)
** confinement since he has been stuck in Korea in his previous life (before the turn back time thing) not being able to go back to his hometown because of the saintess.