Serina is abducted after finishing a modeling job. She is taken to a dimly lit room and given an explanation by a man named Saginuma. Her boyfriend, Kazuki, who went missing after borrowing 50 million yen, forged an IOU with Serina's signature on it, and she ends up shouldering the debt.

Rinko, an ordinary office worker, lives a happy life with her boyfriend Hiroshi. However, her father attempts suicide, leaving behind a huge debt...

Reina, an office worker, is engaged to her coworker Masahiko and is living happily ever after. But one day, 20 million yen that Masahiko had misappropriated from the company disappears along with the person in charge...

1 year after being married, kyoko spent their happy days with yukihiko his husband, but suddenly her husband disappeared. and what left for kyoko is a debt from her husband company. after that kyoko have to work in an exclusive club and become a whore to pay debt.