The husband went on a business trip alone, and the son was busy with his studies. The lonely housewife Yuki was caught masturbating by her son's friend who came to stay overnight for studying. Threatened by the friend, she was forcibly raped... The son's friends played lewd pranks on Yuki while the son wasn't looking, unleashing their youthful desires onto her. Eventually, Yuki's body began to respond…
