Aya, a daughter-in-law who is often asked by her mother-in-law to see her grandson's face. One day, the mother-in-law proposed going on a hot spring trip. Aya was enthusiastic but was ordered by her mother-in-law to have sex in the hot spring and was even made to drink herbal tea that stimulates sexual desire. On the day of the trip, due to the effects of the herbal tea, Aya was so excited that she couldn't be satisfied with sex with her husband. Meanwhile, her father-in-law was also full of energy and tried to embrace his wife but was rejected. As both were in a state of frustration, the father-in-law accidentally saw Aya naked and could no longer hold back...
