To take preventive measures against further atrocities caused by the Unidentified Life Forms, the police introduce the G3 unit. But when it is time to fight the murderous Pantheras Luteus, the G3 falls short to the power of Agito.

Hibiki takes Todoroki to his mountain training temple to teach him how to play the taiko so that the Oni are better prepared to deal with the summer Makamou, which are resistant to stringed instruments. Unfortunately, the training seems to be too intense for Todoroki, who loses faith. Meanwhile, Asumu is assigned the whistle in his high school�s brass band and is not too pleased with not having the chance to play the drums.