Mafia King's Sister Bts Ff

Bts Korea's dangerous mafia .Min yoongi mafia king who is grumpy and cold to everyone have a soft for a girl .Even other mafia members of bts doesn't know he has a sister .Kim Y/n 50% owner of 6th largest company .But what happens when her own real brother took advantage of her .
Revenge of a sister from her real brother .

Sorry for spelling mistake and its my first story .