Although it's not a large home, Mao lives with her husband, Masaki, in their newly acquired home. One day, Masaki is promoted to assistant manager, allowing Mao's grandmother to move into a well-regarded nursing home. The person who helps her with this is Nishikawa, Masaki's boss and Mao's former boss. One day, Masaki brings Nishikawa home, gets drunk, and ends up drunk with her. Nishikawa then confesses that he has always loved Mao, and starts groping her body while talking about her husband's future and even the future of her grandmother...