It is time for the Aoi Festival and Kazuki's class, Class B, has done nothing to prepare. Then Yamase, an old childhood friend of Kazuki who is in class F, appears to make him an offer that would solve both their classes problems for the Festival: a joint play performance. During the chaos of the festival, Class B summons a beast that goes out of control, and Kazuki is left to save Yamase from it. His magic count drops to three as a result.