Ever since he got married and started living with his mother-in-law Yuka, Tsuyoshi has been overwhelmed by his mellow sex appeal. The sex appeal that was unconsciously spread out increased day by day, and the limit of endurance was near. Of course he loves his wife... but it is also true that he is attracted to Yuka. Yuka, who doesn't even know about Tsuyoshi's conflict, ends up drinking too much at her class reunion after a long absence. Tsuyoshi takes care of her drunken Yuka, but her skirt is turned up and she can't take her eyes off her exposed buttocks.
