Hazuki Mao, a 28 year-old-woman. Her parents left the debt to the girl and ran away overseas. With no one supporting her, Mao has to live off by leeching other women and hiding from the shark loan. Unfortunately, she was killed by the hand of one of those mistresses. AGE-GAP, TeacherxStudent. OC x Sona x Rias x harem. This happened two years ago before the series begins.