Yae is an unremarkable girl who temps for a living. She loses her home and job in one stroke and is, at 29, at her wits’ end. Then her childhood friend Takumi appears before her. A good-looking, successful architect, he lives a glamorous life. In exchange for free accommodation in his skyscraper condo in the heart of Tokyo, Yae acts as his fake wife?! This is the story of a fake marriage to a smug, handsome architect!
Takumi's brother's wedding is around the corner, and Yae is having the time of her life looking after her niece together with Takumi. That is, until a young lady barged into their apartment, holding what appears to be a marriage form with Takumi's signature on it...?!