Makoto's grandfather was the principal of the great Onodera Academy, and when he passed away, he left Makoto and his school staff with one very important will - "The one man who is able to seduce Makoto with his superb sexual techniques will be given the right to take over as Onodera Academy's new principal!" Because of this ridiculous last request, Makoto is now every faculty member's target for sexual harassment! Desperate to protect his virginity, Makoto seeks help from his childhood friend (and the man who he has always loved), Kintaro.

深谷美樱（原舞香 配音）是一名普通的大学四年级女生，个性率真而又直爽，在朋友之中十分受欢迎。某日，美樱前往参加同学会，意外的遇见了名为九条隆秀（铃城叶 配音）的男子，原来，在中学时代，美樱曾经暗恋过隆秀，只是当时她选择了将这份感情埋藏在心底。更让美樱感到吃惊的是，如今的隆秀继承了老家的寺院，这也就意味着，这个她曾经喜欢过的男孩，现在是一名和尚。
因为对方是和尚就放下了戒心的美樱，在误打误撞之中和隆秀发生了亲密关系，两人度过了脸红心跳的悸动一夜。之后，美樱更是在半推半就之下，成为了隆秀的“未婚妻”，住进了寺院，就这样，美樱同和尚一起的同居生活正式拉开序幕。