Married Couple Swap
夫婦交歓～戻れない夜～
Fuufu Koukan: Modorenai Yoru
Overview
"Shall we join them?" Reiji, accompanied by his wife Kanade and their close friends Kosuke and Asuka, had visited the inn for vacation. On the first day, during dinner, a heated argument broke out between the two couples, and Asuka dragged Reiji away to her room. But from inside, he could hear his wife Kanade's restless sighs... (Source: Coolmic) Note: The complete edition with explicit scenes was distributed web via Comic Festa Anime Zone. The on-air version was broadcasted on Tokyo MX and BS11.
Source: AniList
Synopsis 日本語
温泉旅行に来ていた礼司・奏夫妻は、ともに旅をしていた親友夫妻の幸祐・明日歌に夫婦交換に巻き込まれる。一夜限りの予定だったが、4人は旅行の後も不倫関係を継続させてしまう。(但し、アニメ版は一夜限りの予定で終わる)
Source: Wikipedia「夫婦交歓〜戻れない夜〜」 (CC BY-SA 4.0)
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