To prepare for childbirth, husband Kenji came to his wife Kiyoka's parental home. Living there were Kiyoka's father and her sister Iroha, who had divorced a few years ago. Since Kiyoka got pregnant, she has been rejecting sex, causing Kenji's sexual desires to build up. He became obsessed with Iroha's voluptuous body and erotic allure. While peeping at Iroha changing clothes, Kenji couldn't hold back any longer. He started to pursue Iroha while Kiyoka was not looking…
