A gathering of wealthy SM enthusiasts secretly held in rotation to view the pet slaves. Hinami, who once aspired to be a professional singer, is now kept by the wealthy Kaminuma, and in front of the enthusiasts, she is to show off her voluptuous body, beautiful voice, and uncontrollable masochistic reactions... The one who performs the harsh torture is the contracted trainer Hijikata. However, Hinami has a strong love for him... Eventually, their intense rendezvous results in Hinami conceiving a child, and Kaminuma, betrayed by his slave, is furious and issues a cruel torture order to him.