Koshimizu says she doesn't dislike her husband, but she just can't get enough sex, so she uses a matching app to find a sex friend. The ideal would be to entwine each other as if kissing and carefully confirming their love, and it would be an intense experience that would make them feel like they were drowning in pleasure. However, the men she met recently were far from ideal sex. There was actually a reason why she was so particular about it in the first place. It was because she was an ex-boyfriend and we had good physical compatibility, and she couldn't forget the sex that felt so good. However, he can't drag it out forever, so he asks for more pleasure and to forget about the past...