Wife-Swap Diaries / Hitozuma Koukan Nikki

This anime, which takes place quite a long time ago, tells the story of a woman and her daughter. Not only are they genetically similar, but they are also attracted to the same man. They both want to be close to him, but he doesn't reciprocate their feelings.

However, another guy appears in their lives who quickly figures out how to take advantage of this situation. Although girls like the idea of this guy, they still prefer the company of another man...