It's not that Koshimizu has come to dislike her husband, but she just can't get enough of the sex they have, so she's using a dating app to find a sex friend. Her ideal partner would be someone who kisses her, clings to her as if to confirm their love, and feels so intense that she's drowning in pleasure. However, the man she recently met was nowhere near her ideal sex partner. There was actually a reason why she was so particular about it in the first place. It was because she couldn't forget the extremely pleasurable sex she had with her ex-boyfriend, with whom she had good physical chemistry. However, she couldn't keep dwelling on the past forever, and so she asked for more pleasure that would help her forget about the past...