Wife's younger sister - Uninhibited female sexuality as seen by a hidden camera -

Kimura, who runs a real estate business near Tokyo, is forced to live an celibate life due to his wife's pregnancy, when his wife's younger sister, Noris, is sent to attend school in Tokyo, so he is forced to live in the apartment next to the apartment they live in. Kimura was captivated by Risa's open-minded personality and young, voluptuous body, and desperately suppressed his sexual desires, but when he discovered a hidden camera set up by the manager he had hired, he was able to monitor Risa at any time, and finally exceeded the limits of his self-control and carried out a plan.