One day, a normal young man named Jiro Tanaka moved from Tokyo to Fukuoka to see his childhood friend Yuki, whom he hasn't seen in 17 years. He was saved by Ohgaman when Yabai Kamen was about to do him in! Seeing some potential in Jiro, Ohgaman trusts Fukuoka's safety in his hands! Now as a hero simply known as "Rookie", can Jiro able to be the hero that saves Fukuoka?

The Dogengers suddenly lose their popularity due to a scandal, thus canceling their highly anticipated second season. Now they are making a living doing stage performances in front of small audiences (consisting of their friends). Standing before them is a new hero of justice Great-Z, who announce that he's going to take Yabai Kamen and his cronies as villains for his upcoming TV show. In order to reclaim their popularity (and getting their second season Un-Canceled), the Dogengers must sneak in to this new show and save the Secret Society of Darkness from the clutches of Great-Z.