Ryoko, the wife of an obstetrician's brother, and Nanako, the wife of an obstetrician's younger brother. They had a little secret ... Unsatisfied with their actions with their husbands, they decided to go to see each other for a reason to secretly exchange their husbands. Nanako called a pregnancy test, and her brother-in-law palpated the horny part on the examination table, and she was quietly enjoying the pleasure. Ryoko also made her crotch moist for her brother-in-law's examination. My wife who came to see me again ... One day, Ryoko and Nanako pass by in front of my brother who chats at the office after the hospital is closed.