- A son who is divorced and raised by a single woman. One day, when I grew up splendidly and got a job, I planned a hot spring trip without bathing in the water with my parents and children using my son's vacation. - Hibiki is upset by the sudden confession of her proud mother who is young and beautiful. A son who can't stand it and approaches his mother. In the midst of the approaching pleasure, I may have really wanted to be like this. Hibiki herself seeks sexual pleasure ... A mother and child who seek each other at the Joshu inn ...