The secret bodyguard teacher is here! For the fifth year in a row, Hanzo-kun's homeroom teacher has been the shadowy and unreliable Shinobu-sensei... In fact, the teacher's true identity is a skilled ninja, who has been secretly protecting Hanzo-kun so that no one will find out! Our teacher is secretly dangerous! The secret bodyguard ninjutsu action begins!! This series gained popularity as a one-shot in the Miracoro Grand Prix, and is now serialized...and is finally being published in book form!