Hiiro Amagi is one of the students of the school of magic. Both angels and demons study in this school. Hiiro is a purebred demon with strong attack magic.

Angels and demons do not get along at all, although they study in the same school. Although, there are rare mentions of unions between an angel and a demon, they hate each other.

Hiiro learned that demons and the angels would have a joint lesson and irritably threw down the schedule, going to the classroom