Takumi, Kyohei, Hideto, Kazuo, and Yuki are five friends who form a rock band to perform at an upcoming school festival. When the friends learn that the festival is cancelled, they threaten to blow up the high school unless the school's administration reinstates the festival. The vice-principal agrees to their demand, but the friends find themselves unable to stop the timing device on their homemade bomb. The classroom in which they are