Zundamaru is back... For now! Even without missions, we elite ninjas face grave dangers every day! (Anime Bancho)

Based on the Ninja Awate-maru comedy manga by Jirou Tsunoda.

Mako, Miko, and Mutsuko are three young girls visiting St. Claire Elementary, a school filled with strange legends. They have an abrupt encounter with Kunstrijk, a human body anatomy model, and Goth, a skeleton model. Both haunt the soon-to-be-demolished science room. Seeking revenge for being vandalized by the three girls, Kunstrijk invites them to the school's midnight party in order to scare them. Together, the five go on a quest to collect three mythical medals that can grant a wish and hopefully save the science room. (Source: ANN)

There are 12 companion pieces in the forms of Fact Files (which expand upon a given character from a corresponding episode) airing shortly after each episode.