Nintama Rantarou: Saraba Ninjutsu Gakuen no Dan

Rantarou overhears the headmaster speaking and comes away convinced that he no longer belongs at Ninjutsu Academy. Shocked and hurt by what he thinks he has learned, he leaves the school behind before anyone can properly explain the misunderstanding.

His timing could hardly be worse. The ninjas of Dokutake Castle are moving again, and trouble is closing in while Rantarou is separated from his classmates. Kirimaru, Shinbei, and the academy must deal with the enemy's latest scheme while finding their friend and making sure his mistaken farewell does not become permanent.