The story follows high school students Kanae and Sousuke, who live in a provincial town that is trying to revitalize itself with music. One day, suddenly "Classicaloid" versions of Beethoven and Mozart appear in front of Kanae and Sousuke. When the suspicious-looking Classicaloids play music they call "mujik," it has a strange power: stars start to fall, and giant robots appear. Now every day is tumultuous. Eventually, more Classicaloids start to appear such as Bach, Chopin, and Schubert. What is the great power that the Classicaloids have? Are they friends or foe to humanity?