Saito High is a high school teeming with spiritual beings, overseen by a principal with a peculiar hobby of collecting occult paraphernalia. The school relies on its Holy Student Council to protect it from supernatural threats, with its members chosen by prophecy. The council's president, Haruto Houjo, possesses the ability to summon spirits, but his desire for a normal life is threatened by his duties. His fellow members, Kazumi Ryodo and Mutsuki Asahina, possess unique skills - Kazumi excels at being possessed, while Mutsuki is a master of exorcism with a complex attraction to young boys. Together, they must navigate their personal demons while keeping the school safe and warding off paranormal entities, often finding themselves in absurd and humorous situations in the process.