Akiha Okada (Nana Seino) is 27-years-old, single, and works as a designer at Morita Design. She enjoys her single life and she doesn't intend to marry at all. One day, while drinking, she meets Shu Momose (Kentaro Sakaguchi) for the first time. While they drink together, she tells him that she doesn't want to get married, but her grandmother wants to marry. Then, Shu Momose suddenly asks her to marry him. She thinks he is ridiculous and declines his marriage proposal. Meanwhile, Shu Momose is 30-years-old and works for an advertising agency. He is diligent at work and is trusted by his colleagues and clients. Due to a specific reason, he is looking for someone to have a fake marriage with. This is why he proposed to Akiha Okada. The restaurant owned by Akiha Okada's grandmother is about to go bankrupt. For her grandmother, Akiha Okada decides to accept Shu Momose's fake marriage proposal on the condition that he lends her five million yen. They soon register their marriage and begin to live together as a married couple. While living together, Akiha Okada becomes attracted to Shu Momose and she learns why Shu Momose wanted to have a fake marriage.
—AsianWiki