High school student Takeru Sumura has a dark secret: his parents were murdered by demons. Consumed by vengeance, Takeru seeks out the famed demon hunter, Ludwig van Beethoven. Beethoven is a magia, a wizard who wields the power of music to battle demons. Taken under Beethoven's wing, Takeru joins the ranks of other renowned magia: Bach, Mozart, Shubert, Liszt and Tchaikovsky. This unique team of demon hunters will use their music based magic to combat the world's demons. Now all Takeru needs to do is figure out how to convince Beethoven to upgrade him from his personal cleaning boy to a full-fledged apprentice!