The stage is Asakusa. One day, three second-year middle school students — Kazuki Yasaka, Toi Kuji, and Enta Jinai — meet a kappa-like creature named Keppi, who is the self-proclaimed heir to the throne of Kappa Kingdom. Keppi forcibly takes the students' shirikodama (a mythical organ kappa steal through a person's anus) and they are transformed into kappa. Keppi informs them, "If you want to return to your former selves, you need to connect in 'that way' and you must bring me the shirikodama of zombies." Will the three boys be able to connect and take the shirikodama of zombies? At the same time, two policemen, Reo Niiboshi and Mabu Akutsu, try to do something at the police box where they are stationed.
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’s plot to highjack Sara’s fan meet goes sideways when it turns out there’s more to her than meets the eye.Watch Now:Amazon
Kazuki goes to unthinkable lengths to make his kid brother, Haruka, happy, including deception and theft.Watch Now:Amazon
Enta and Kazuki follow Toi, who is going into the past to remove himself from existence.Watch Now:Amazon
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.Watch Now:Amazon
Having failed to defeat the previous kappa zombie, the three are stuck as kappa. Meanwhile, Reo and Mabu become more desperate for kappa zombies.Watch Now:Amazon
Enta and Keppi are both in critical condition. Meanwhile, Toi and Chikai flee from town, only to run into even more trouble.Watch Now:Amazon
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.Watch Now:Amazon
Chikai wants Toi to leave town with him. He bumps into Enta, and they go on a walk around as they share their predicamentsWatch Now:Amazon
With things returning to normal for the three, they begin playing soccer together, but someone seems not to be happy with that.Watch Now:Amazon