Ninja Boy Rantaro - S11

The Ninjutsu Academy students come back from summer break and find out that thanks to one of Komatsuda's mistakes, all their summer homework got mixed up. Because of this, Kisanta ended up with an assignment meant for a sixth year, and now he's gone missing after trying to sneak into Oomagatoki Castle to steal their lord's fundoshi. A group that includes Shinbei and Kirimaru is sent to rescue him, but since Oomagatoki is at war with Tasogaredoki Castle, it might be a tough mission. Meanwhile, Ninjutsu Academy gets a request for help from a village dealing with the war, and Rantarou, along with the rest of the students and teachers, heads there to assist.