Kei has no complaints about her kind husband, but she feels dissatisfied when she thinks that her life will continue without any excitement. Even when she tries to seduce her husband wearing sexy underwear, it ends with bland sex, which makes Kei even more frustrated. Meanwhile, her nephew Takashi is going to live with her for a month to attend special classes at his university. A few days later, when Kei opens a package delivered from somewhere, she finds an electric massager inside.
