Episode Title:
Preventing flu (Kenichi's technique of fighting cold) / Installing the security system (Ninja Hattori accepted a challenge).
Episode Description:
Preventing flu (Kenichi's technique of fighting cold): Hattori wakes Kenchi and trains him to perform regular exercises. He also teaches him how to deal with winters. Kemumaki interferes and tries to stop them in all possible ways, but fails in doing so.
Installing the security system (Ninja Hattori accepted a challenge): Kenichi and his friends, except Hattori, enter Kokei-Sensei's home to test the home security system. But fail at it. Hattori enters Kokei-Sensei's house and completes the challenge.
