神前夕哉原本和父亲一起生活，可是没过多久，父亲再婚，继母带着一个女儿美月搬进他们的家中。这个家因为女人的出现开始带来不便，夕哉再也不能随意穿着内衣裤在家里游走。美月比夕哉年少，两人虽然没有血缘关系，但是因为家庭关系的重新组合，从此以兄妹互称。美月一直拿夕哉当哥哥对待，并他并无男女私情。某日，暗恋夕哉的少女寿日和因为一场交通事故身亡，她还没来得及向夕哉表白，所以心有不甘，变成了幽灵。成为幽灵的寿日和附身在美月身上，并给她穿上贞操带一样的情趣内衣。自从被寿日和附身后，美月性情大变，她开始缠着夕哉，并在家中无人时诱惑夕哉，想和他发生性关系，面对和之前判若两人的美月，夕哉感到非常陌生，他能否抵挡得住美月的诱惑。而寿日和是否能完成自己的心愿，和夕哉成为一对恋人

Kammae Eve originally lived with his father, but not long after, his father remarried, and his stepmother moved into their home with a daughter, Mizuki. The presence of a woman began to cause inconvenience to this family, and Xizai could no longer wander around the house in her underwear. Mizuki is younger than Xizai, although the two are not related by blood, but due to the reorganization of family relations, they have since called each other brother and sister. Meiyue has always treated Xizai as an older brother, and he has no affair with men and women. One day, the girl Shou Rihe, who had a crush on Xiya, died in a traffic accident. Before she had time to confess to Xiya, she was unwilling and turned into a ghost. Became the ghost of the birthday and possessed Mizuki, and put her on sexy lingerie like a chastity belt. Since being possessed by Shourihe, Mizuki's temperament has changed drastically. She began to pester Yuya, and seduce Xizai when there is no one at home, wanting to have sex with him. Xizai felt very strange, whether he could resist the temptation of Mizuki. And whether Shou Rihe can fulfill his wish, He Xizai will become a couple of lovers