A journey of police officer changes to become a biggest mafia Kim Taehyung was a kind and sweet police officer who fell in love. Was living a normal and happy life... Until one day his happy life turn upside down.. See the journey of how a kind police officer kim Taehyung become a korea's biggest mafia kim Taehyung. Taehyung x Reader (as Ga-eun name because I'm uncomfortable to use yn. I hope you like your character name)