The Schoolhouse That Never Sleeps.Representatives of the Kairoushuu and the Banten clans reach the Alya Academy located in the Kouga Village to discuss the future of the world of Nabari and are welcomed by the students of the academy since the leader of the village is on his deathbed. Secretly, everyone is just after the Daya, the kinjutsushō of the Kouga Village. Tobari is unable to understand why Miharu has defected to the Kairoushuu clan. The students of the academy attack the Kairoushuu and the Banten ninja at night.