The main characters of this story is Yoseob.. Who's mental health isn't stable ever since he pulled out the knife which was in his mother's throat (his mother tried suicide).. since then he saw his dual personality..
Later his father also died (idk how but I think it was suicide) he got adopted by his uncle and there he met Jaeha (who became his elder Brother)
Jaeha had a trauma (Something like that) and he can't rely on people bcz of it.. That's why he needed someone desperately and he got Yoseob (He used Yoseob for his own desire and made Yoseob so obsessed with him)
In short : Yoseob grew up like a Yandere with his Dual personality.. He murdered people and Jaeha also died by an accident that time..
The MC Yeseob was abused and has major trauma issues. He gets adopted but liek the parents are kinda neglecting. The older son takes care of him. The older son was bullied and ostrcized in school so to make himself more confident, he makes Yeseob rely on him.
But like yeseob rly needs therapy and he's a major yandere. Everytime someone gets too close to the older brother Yeseob threathens them. And it ends with yeseob finally cracking a murdering a bunch of people while the brother dies.
Can someone explain to me the story cause I don’t think I’ll read it