Ogura Mayuri is a high school loner with a fondness for cooking and magic, skills her mother taught her. She has already summoned a small demon familiar to assist with baking and other minor chores. However, after accidentally spilling tea on her skirt, she inadvertently summons a high-level demon named Beaut, who offers to grant her one wish. Mayuri wishes for the stain on her skirt to vanish in exchange for candy. The demon Beaut is outraged by such a trivial request, but he becomes distracted by the scent of sweets, which is his weakness. Mayuri now exploits Beaut’s weakness to bind him to her and make him do her bidding.