Kappa no Coo to Natsuyasumi

A curious stone brings an extraordinary guest into Koichi’s home: a young kappa who has slept through centuries of change. Named Coo by his new friend, the water creature finds a temporary family among the Ueharas.

Friendship cannot entirely ease Coo’s longing for his own kind. Koichi joins him on a journey to seek other kappa, while the attention their unusual companion attracts threatens the quiet life the family hopes to offer him.