Ignored's manga / #Brothers(13)

Both brothers are twisted. The MC that sleeps with his bro's many gf to keep them from going back to him, because he so wants to fuck him, while that one sleeps around with anything human while dreaming of being ravaged by the MC

Yoseob, normally very quiet and composed, is in the police station convicted of stabbing 8 civilians with a knife. Does he, a mere high-schooler, have any reason to have done such a horrifying act? Does his obsessive love for his older brother, Jaeha, have something to do with it?