Ai Suru Tsuma, Mariko no Furin Houkoku: Otto Kounin no Gachi Furin Sex

The protagonist Sashihara Yasushi and the heroine Sashihara Mariko have been married for 5 years. Mariko was found out to have had an affair back when they were newly weds, but nothing major came out of it and they've lead a peaceful married life si...