Masato Kamioda is a devout Christian aspiring to become a priest. He's the only male student at the Saint Sophia Girls' Academy as a part of the reform to repair the moral decline and the lax discipline at the school. However, there are girls who welcome him such as Ayano, and there are those who think he's a perfect boy-toy such as Eri and Rumi. Can Masato stay at the academy without getting expelled despite the constant plots by Shizuka, the student body vice-president?