- Kokoro, a daughter-in-law who is still under pressure to give birth to her grandson. One day, at the suggestion of my mother-in-law, I decided to go on a hot spring trip with my family. However, in order to make a child, she is ordered to abstain from her mother-in-law for one month before the trip. On the day of the trip, my husband refuses to have SEX. On the other hand, his father-in-law also tries to hold his wife, but is refused. - The two who have too much sexual desire headed to the hot spring to calm their agonizing bodies. And my father-in-law, who happened to witness the bathing appearance of the heart ...