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 and Yae return to their hometown to help prepare for Takumi's brother's wedding, as well as to ask Yae's family for permission for her own hand in marriage. On their way back from Yae's family home, they share some old memories as they pass by familiar locations, and Yae learns of Takumi's immeasurable feelings for her. Their relationship deepens from their trip, but in no time at all, they happen to cross paths with Takumi's ex-girlfriend. The ex takes this chance to close in on Yae and tell her some absolutely shocking news...