The Forons barely rejected the attack, but one of the musical instruments hidden in the Torbas Shinkyoku Gakuin, the infinite keyboard (Infinite Piano), fell into the hands of "The Gentiles of Lamentation." The army and police are also taken by the ball, and the musical instruments hidden in various places are being robbed one after another. Forons are overwhelmed by the tremendous secrets that are suddenly informed. Corticarte thinks about Foron, who will be his companion, but Foron decides to put himself into battle with Corticarte ...