
Overview:
After the noble Kappa Kingdom falls to the Otter Empire, the Kappa prince Keppi loses much of his power and becomes helpless against the unseen Kapa-zombies. These zombies plague the world, and are the creations of the Otters and manifestations of people's deepest desires. With no other choice, Keppi must rely on three young boys: Kazuki Yasaka, who must carry a box with him wherever he goes; Enta Jinnai, Kazuki's childhood friend; and Tooi Kuji, a delinquent and a school truant.
By having the mythical organ called a shirikodama removed from them, the boys are able to become Kappa themselves and fight the Kapa-zombies. However, to defeat them, the boys must connect with each other via their minds, bodies, and—most importantly—secrets. As the Kappa Kingdom relies on these boys, they must reveal themselves as they have never done before, all the while learning that connections are fragile and truly precious things.
[Written by MAL Rewrite]
Characters and Voice Actors

Jinnai, Enta
MainHorie, Shun
Japanese

Kuji, Tooi
MainUchiyama, Kouki
Japanese

Yasaka, Kazuki
MainMurase, Ayumu
Japanese

Akutsu, Mabu
SupportingHosoya, Yoshimasa
Japanese

Azuma, Sara
SupportingTeiko
Japanese

Circle-Kero Clerk
SupportingIkuhara, Kunihiko
Japanese

Enta's Grandmother
SupportingSaitou, Kimiko
Japanese

Hakoda, Osamaru
SupportingKatou, Ryou
Japanese

Jinnai, Otone
SupportingIse, Mariya
Japanese

Keppi
SupportingSuwabe, Junichi
Japanese

Kuji, Chikai
SupportingTsuda, Kenjirou
Japanese

Nekoyama, Moukichi
SupportingKatou, Ryou
Japanese

Niiboshi, Reo
SupportingMiyano, Mamoru
Japanese

Otter
SupportingKuroda, Takaya
Japanese

Yasaka, Haruka
SupportingKugimiya, Rie
Japanese
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