Hana and Keita live together because they both have strong sexual desires. One day, while Keita is away, Hana can't control her sexual desire and ends up having an affair! Enraged, Keita punishes Hana by banning her from having sex for a week, and also imposes the condition that she must swallow semen every day during that period, which also serves as a way to relieve Keita's sexual desire. Hana despairs, but she persists for the best creampie sex a week later.