Maki Hojo and Kento live in the same apartment building with the Natori family, who are close friends. One day, they decide to exchange mothers for a week. Since they have been acquainted with the Natori family for a long time, Maki Hojo agrees, thinking she is safe. However, the true nature of the Natori family is that their mother, Shizuka, abandons housework and childcare, and their son, Takuro, is starved for love. Maki Hojo is shocked by this reality and is soon consumed by Takuro's sexual love.
