A strange old woman allows a teenage runaway and a young orphan to stay in an abandoned house that overlooks the sea. However, when a menacing entity threatens their new home, they must band together and face their fears to save it.
| Actor | Role |
|---|---|
 Mana AshidaYui (voice) | Yui (voice) |
 Sari AwanoHiyori (voice) | Hiyori (voice) |
 Shinobu OtakeKiwa-san (voice) | Kiwa-san (voice) |
 Takuya TassoKappa of the Kozuchi River (voice) | Kappa of the Kozuchi River (voice) |
 Sally AmakiZashiki-warashi (voice) | Zashiki-warashi (voice) |
 Mikio DateKappa of Toyosawagawa (voice) | Kappa of Toyosawagawa (voice) |
 Shohei UnoKappa of Mabechigawa (voice) | Kappa of Mabechigawa (voice) |
 Takeshi TomizawaKappa of Kitakamigawa (voice) | Kappa of Kitakamigawa (voice) |