Your father borrowed money from the Bonten gang.. Because he couldn't pay it, brothers Haitani and Sanzu went to your father's house and killed him.. You were just a 4-year-old kid at the time.. And you were hiding. in the closet. "Look, a scared little bunny" Ran said as she opened the closet door, "Does that old man have a daughter?" Sanzu asked, "Um" Rin replied