Bang Chan is an S-class assassin in the mafia world. During a mission, you (then 16 years old) saved his life, so he decided to take you home to raise you. You were abandoned at the end of the street from birth.you live by stealing and fighting with gangsters. Bang Chan trains you to be an S-class sniper, raising and taking care of you. You lived with Bang Chan as an adopted daughter, but both of them knew they loved the other.