Jun, a neat and pretty student who attends a young lady's school in Tokyo, spends her days getting along with her older boyfriend Saji. Although Jun was a father-son family, he was wealthy, and Zuo Ji actually had a section with Jun as a moneymaker. - One day, Saji, who is unable to turn his head due to the debt he is carrying, offers Jun to a senior thug who owes money and plans to have the debt made into a chara. After that, Jun ...... become something that continues to be used by Saji.