Hayato is a high school student, studying magic. He lives a peaceful life with Tsuzuri, his childhood friend, Heineken, his close friend, and other classmates. One day, Hayato and Tsuzuri see aurora on their way home astride a broom, and the broom suddenly starts going down. They can't control it, and just when they hit the ground, they lose consciousness...
When they wake up, they find themselves lying in a sick-room. According to Kozue, his friend, when aurora appears, the sun also comes out. There is no sun in their world, so it means a sign of evil. They decide to investigate it, and Hayato reluctantly joins them. Like this, they open a door of a checkered school life...
