There is a similar-sounding series called (More Than a Married Couple, But Not Lovers). While also focusing on "couples," it is a high school romantic comedy about students practicing marriage, whereas Fuufu Koukan focuses on adults in actual marriages. If you'd like, I can help you: Compare the manga and anime endings Find similar adult romance dramas Break down the character motivations further Which of these

As the night progresses, the characters find themselves dealing with unexpected feelings and attractions that complicate their original relationships.

その夜、二人は眠れないままベッドに横になったが、以前のような冷たさはなかった。互いに手を握り合い、短い時間を共有することで、距離が少しだけ縮まった。恵理子は心のどこかで危うさを感じながらも、新しい種を蒔いたような希望を抱いていた。

: It has been made available for streaming on platforms like the Anime Times Channel Amazon Prime Video in certain regions. Note on "Married Couple's Better"

If you want, I can:

: Sakuya's wife. She is beautiful and kind, but the swap awakens desires she hadn't previously explored. The Kikuhara Couple