Spoiler
IMPROVEMENT? Twin it's literally never a romantic story, it's a revenge manhwa. A rebge of the ML for what the MC did to him in past. That's it. It keeps getting worse u til they both become mentally sick. The MC gets Stockholm syndrome.
Juyeon becomes a prisioner of his own hatred and revenge, while Jiwook never leaves Juheon after he remembered as what he's done to Juyeon in the past and never tries to escape believing he deserves this.

Guys spoil me please i wanna know if there will be any type of improvment in the story