friend's wife

Nana married Takashi, her classmate from university, and was living a happy life. Although she lives in company housing, she feels comfortable, and the presence of her husband's best friend, Ryuichi, who lives next door, is also a source of reassurance for Nana. One day, news of a class reunion arrives from the club that Nana, Takashi, and Ryuichi belonged to during their university days. Nana and Ryuichi decided to attend alone, leaving Takashi behind because he was unable to attend due to work. However, what dominated Nana's mind at the reunion was not the memories of her old friend, but the love she had for Ryuichi, which she had once given up.