Fumiko came to a hot spring trip with her husband and son. Her husband, who had not been able to spend time with his family due to his work, was injured. His son was truant, but through his family's harmony, he gradually started going to school. Meanwhile, the only thing that Fumiko was worried about was that his son was hiding and masturbating in his mother's underwear. Fumiko pretended to be calm while noticing this, but her son finally took action on this trip.
