Yuka, who has finished raising her children, has been working part-time for three years. In the meantime, she had an affair with a part-time college student, Takahashi, and was enjoying her unscrupulous relationship. One day, she decided to go to a hot spring on a comfort trip. Of course, Takahashi was among the members of her comfort trip. Yuka, who has a strong libido, secretly invites Takahashi to enjoy sex in the middle of the night, but she is noticed by Kobayashi, a part-time worker who came with her.
