Open Marriage: Aru Fuufu No Taikenki

オープン・マリッジ　ある夫婦の体験記

The third installment of this erotic drama depicts a new type of marriage in which a woman embraces another man for the sake of her beloved husband. Yuki, who married her first love for love, begins her newlywed life full of hope. However, due to Yuki's lack of experience with men, their nighttime married life begins to go wrong