A young boy is secretly a ninja who has protected his neighbor since kindergarten.
EPISODE 1
400 Continuous Years of Protection
Mamoru and Yuna begin their first day as second years and Airi invites them to go bowling.
EPISODE 2
There is Nothing in This World I Cannot Cut
A girl dressed like a swordswoman tries to kill Yuna and Mamoru must fight to protect her.
EPISODE 3
The Girl from Ninja Village
An old playmate of Mamoru's appears, and she does not do so quietly.
EPISODE 4
It's All About Becoming an Idol
The girls apply to audition to become an idol and Mamoru is shocked by the outcome.
EPISODE 5
A Girl's Heart and Samurai Soul
Mamoru and Tsubaki look to discover a new ninja's identity and take him down.
EPISODE 6
The Stunning Transfer Student
A new student joins Mamoru and Yuna's class and she wants to get to know Mamoru more.
Mai Nakahara
Atsushi Kisaichi
Ryôko Shintani
Sachiko Kojima
Ai Shimizu
Erina Furukawa
Yoshitaka Fujimoto
