The first episode description and staff list, taken from the Sarazanmai website.
STORY: Tokyo, Asakusa. Three second year middle school students Kazuki Yasaka, Tooi Kuji, Enta Jinnai encounter a mysterious life-form called Keppi who claims to be the heir to the throne of the Kappa Kingdom and who pulls out their shirikodama (mythical ball inside the anus) turning them into kappa. In order to return to their human form, what is the mission that the three of them must clear?
Script: Kunihiko Ikuhara, Teruko Utsumi
Storyboard: Kunihiko Ikuhara, Nobuyuki Takeuchi, Katsunori Shibata, Maimu Matsushima
Episode director: Masato Jinbo