Married Life Swap: The Night They Can't Return Type: Adult Anime (Hentai) OVA Status: Completed (Multi-episode series)
I'm assuming you're referring to the Japanese manga and anime series "Fuufu Koukan: Modorenai Yoru" (also known as " Married Couple Exchange: Unforgettable Night" or "The Exchange of Married Couples: An Unforgettable Night"). fuufu koukan modorenai yoru th link
A: Episodes are approximately 6 minutes long. Married Life Swap: The Night They Can't Return
The title translates to The story revolves around two married couples who are close friends. During a joint vacation, a series of unexpected events, misunderstandings, and hidden desires lead them to engage in a "spouse swap" (fūfu kōkan). a series of unexpected events