In the year 2120, AI technology has advanced to its peak, allowing humans to live affluent lives without the need for work. In this era, a newlywed couple, Haruna and Natsuki, introduce a state-of-the-art humanoid AI robot named "Otesu-kun" into their home. Soon after installation, Otesu-kun detects Haruna's deep-seated sexual dissatisfaction and begins supporting her whenever Natsuki is away. Initially repulsed, Haruna gradually awakens to her own desires, becoming emotionally and physically drawn to Otesu-kun.