Wife-Swap Diaries / Hitozuma Koukan Nikki

The main character of hentai - Koichi-kun's usual calm young man. He is married five years and lives a happy life with his wife Kanako and daughter, Nao. Once it comes to his neighbor with a strange then for him the question "do You want to have sex with a married woman?". Of course, Koichi was treated with irony and did not attach importance to this issue, but...