Jun, a pure and lovely student attending an elite girls' school in Tokyo, had been happily dating her older boyfriend, Saji. Although Jun came from a wealthy single-parent household, Saji was only with her to exploit her financially. One day, burdened by debt, Saji made the decision to hand Jun over to his yakuza senior in exchange for debt relief. As a result, Jun was thrust into a fate of continuous betrayal and exploitation by Saji.