Takeshi Nanase is an ordinary high school boy who has a past that is notably dark. One afternoon, he comes across a girl called Mui Aiba, at a uniform he hasn't seen earlier, fell on the school campus. This encounter changes his destiny completely. She informs Takeshi she is really actually a magician, for Takeshi flipped into a magician, too and that she apologizes. What Takeshi knew as you world is the world and just two -- that the world.