A husband who is busy with work and can not make a real partner. Mao, a busty gal wife who is a woman, provokes her father-in-law who lives with her and enjoys it every day. One day, Mao starts to move when she is informed that her husband will be late for work. The father-in-law who got on the provocation is absorbed in the body and seeks the true body almost every day. As a result of continuing the relationship between her husband and father-in-law, two men, there is finally a change in Mao's body. What is the change that happened to Mao's body?