title: 야한 오빠 친구 another 🔞 title, a cheating boyfriend should never be forgiven! mc made the right decision to dumped that guy😏 ml was the brother's friend, he was always there for her even on the day she witnessed her ex-boyfriend cheated on her, she take a picture as a proof while shaking, didnt believe what she witnessed & was rescued by the ml before she even crumbles in pain