The daughter-in-law, Nina, is under pressure to give birth to her grandchild yet. One day, at the suggestion of her father-in-law, her whole family decided to go on a hot spring trip. However, in order to make her a child, her mother-in-law orders her to be abstinent for a month until her trip. On the day of her trip, Nina is turned down by her husband for sex. On the other hand, her father-in-law also tries to embrace her wife, but is 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 Nina bathing...