Yuri lives with her husband and her father-in-law, who needs her care. Taking up too much time to care for her father-in-law and struggling financially, Yuri actually makes money through erotic chat. However, her husband becomes suspicious of his wife's behavior and asks his father-in-law to investigate. The father-in-law then dons a mask and becomes a "Tengu man" who not only exposes his wife's infidelity, but also makes him take care of her private parts under the pretext of caring for her...