The daughter-in-law, Hikaru, who is under pressure from her mother-in-law to give birth to her grandchild, is given a SEX prohibition order to make a child until a hot spring trip one month ahead. However, on the day of her trip, she is refused sex by her husband. On the other hand, her father-in-law also tries to embrace her wife, but is also refused. The two who had too much sexual desire headed to the hot springs to calm their bodies. And her father-in-law, who happened to witness Hikaru's glossy bathing appearance, could not suppress her desire.
