The husband went on a business trip alone, so his wife, Yuka Kana, had to stay at her father-in-law's house. Due to the loneliness of her husband's absence and unsatisfied sexual desires, she ended up having an affair with a colleague from her part-time job… The father-in-law, who had been asked by his son to keep an eye on his wife, learned about her infidelity and began to have sex with his daughter-in-law.
