Hitozuma Koukan Nikki
English title: Wife-Swap Diaries
Japanese title: 人妻交姦日記
Type: OVA
Episodes: 2
Source: Visual novel
Genres: Hentai
Studios: Y.O.U.C
Producers: Digital Works
Duration: 27 min per ep
Rating: Rx - Hentai

Kouichi lives a happy life with his wife, Kanako, and daughter, Nao. But one day, Kimihiko, his neighbor, says to him, "Do you wanna fool around with a married woman?" "What?" What Kimihiko suggests Kouichi is to swap their wives. Kouichi doesn't take it seriously at first, but....

(Source: ErogeShop)