Y/n is a school girl that goes to the same school that a girl name Crystal goes to. Y/N falls in love with 4 boys named Yoongi, Jimin, Hoseok and Namjoon. They are the older brothers of Crystal. She is terrifed of them because they are members of BTS the most dangerous gang/mafia.

Crystal is a girl that goes to Soeul high and has 4 older brothers. She is a orphan that gets adopted by BTS. They visits the orphanage to visit Crystal. The owner of the orphanage is really mean to the orphans. Crystal's mother and father died in a car crash so her uncle sent her to a orphanage. Her brothers rarely see her when their parents were alive. Bts is really nice to her, since 4 of them is her brother and 3 of them is her cousins. BTS is the most dangerous gang/mafia in the city and school.