Kengo (Takeno Uchiyu) is an ordinary aquarium employee. He originally had a happy and harmonious family, but recently he was worried about his sister Maria (Kitano Kii) suffering from a serious illness. In addition to paying huge medical expenses, if a matching liver cannot be found as soon as possible, his sister's life will be in danger. Kengo's fiancée Minako (Itaya Yuka) left him because she could not bear the tremendous pressure. One day, Kengo accidentally rescued a woman who wanted to commit suicide. The woman's name was Risa (Ueto Aya). Her brother (Inagaki Goro) was not doing his job and owed a huge amount of usury. Risa had to go to work in a brothel to repay the loan for her family. She was overwhelmed and had lost confidence in life. In desperation, Kengo suddenly came up with the idea of faking marriage with Risa and letting her transplant her liver to save her sister...