Kishigami house in 妊活 also strive to ovulation date not blessed with quite Kodakara. Sister-in-law Rico, which has been running away from home and the couple Fight for the same reason to there to visit .... When approaching glamorous in Big Tits G cup body to her Yuta of the brother-in-law deprived mind involuntarily not to his wife, his desire was to explode at once in that was a worrying endlessly can not sex only with each other the day of ovulation. Two people who became the day to each other required sneak to the border is, drowning in the pleasure of cum without regard the risk of pregnancy .... 排卵日に励むもなかなか子宝に恵まれない妊活中の岸上家。そこへ同じ理由で夫婦ゲンカをして家出してきた義姉・莉子が訪れて…。妻には無いグラマラスな爆乳Gカップボディに心奪われた義弟の祐太は思わず彼女に迫ると、お互い排卵日にしかセックスが出来ず悶々としてた事でその欲望は一気に爆発するのだった。その日を境にこっそりと求め合うようになった二人は、妊娠の危険も顧みず中出しの快感に溺れて…。