Kyuta, a boy living in Shibuya, and Kumatetsu, a lonesome beast from Jutengai, an imaginary world. One day, Kyuta forays into the imaginary world and, as he's looking for his way back, meets Kumatetsu who becomes his spirit guide. That encounter leads them to many adventures.
役所広司
as Kumatetsu (voice)
宮﨑あおい
as Young Kyuta (voice)
染谷将太
as Teenage Kyuta (voice)
広瀬すず
as Kaede (voice)
中川雅也
as Hyakushūbō (voice)
大泉洋
as Tatara (voice)
山路和弘
as Iozen (voice)
宮野真守
as Teenage Ichirohiko (voice)
山口勝平
as Teenage Jiromaru (voice)
黒木華
as Young Ichirohiko (voice)
大野百花
as Young Jiromaru (voice)
諸星すみれ
as Chico (voice)
