
After accidentally breaking a statue of the guardian god of the Asakusa district, middle school students Kazuki, Toi and Enta are transformed into kappas -creatures from japanese folklore- by Keppi, self-proclaimed prince of the Kappa Kingdom. If they want to regain their human form, they must collect the five Dishes of Hope for him, which fulfill the wishes of whoever possesses them. To do so, they will fight against the kappa-zombies and extract their "shirikodama", the mythical organ containing humans' deepest desires. Two policemen, Reo and Mabu, are the ones behind this evil scheme, turning humans into zombies as agents of the Otter Empire, enemy of the Kappa Kingdom since ancient times. In the guise of "Kappazon, Inc.", they control society by manipulating the desires of the masses for their own goals. To succeed in their mission, the boys must be connected through the "Sarazanmai", revealing their most intimate secrets in the process...






Three middle schoolers, Yasaka Kazuki, Kuji Toi and Jinnai Enta encounter Keppi of the Kappa Kingdom. Butt stuff happens, and the three are enlisted to fight kappa zombies.
Kazuki goes to unthinkable lengths to make his kid brother, Haruka, happy, including deception and theft.
Having no way to express his feelings for Kazuki, all Enta can do is to try to get him back in the soccer club.
Kazuki needs Toi's help to take over Sara's fan meet. Meanwhile, Toi has his own demons to fight.
Kazuki's plot to highjack Sara's fan meet goes sideways when it turns out there's more to her than meets the eye.
Having failed to defeat the previous kappa zombie, the three are stuck as kappa. Meanwhile, Reo and Mabu become more desperate for kappa zombies.
With things returning to normal for the three, they begin playing soccer together, but someone seems not to be happy with that.
Chikai wants Toi to leave town with him. He bumps into Enta, and they go on a walk around as they share their predicaments.
Enta and Keppi are both in critical condition. Meanwhile, Toi and Chikai flee from town, only to run into even more trouble.
Enta has four hours left to live. The only way to save him is with the Dishes of Hope, but Reo also needs them to bring back the real Mabu.
Enta and Kazuki follow Toi, who is going into the past to remove himself from existence.