Even after getting married, the Minami couple is still happily married, making love almost every night. However, after the husband was unable to get it up due to work stress, they haven't had sex for a long time... The wife, Serina, has a strong libido, and although she releases her sexual desires by masturbating day and night, she still feels unsatisfied. One day, while indulging in masturbation as usual, she accidentally meets the eyes of her neighbor, Takagi. Serina quickly hides, but her body becomes even hotter when she realizes that she has been seen in a lewd manner...