After the daughter got married and started living with two households, everything seemed happy on the surface, but in reality... The wife was not satisfied with her husband's performance and secretly pleasured herself. One night, her son-in-law, Satoru, caught a glimpse of this... Upon hearing the situation, it turned out that his penis was too big for his wife to accept. Captivated by his stiff member, Rena decided to help him with his sexual needs for the sake of maintaining her daughter's marital harmony... Satoru was taken aback by the sudden turn of events. However, he gradually fell under the spell of his mother-in-law's seductive techniques day and night.
