Japanese anime feature directed by Keiichi Hara that centres on the mythological water creature from Japanese mythology known as a kappa. Set in modern-day Tokyo, when young Kouichi Uehara (voice of Takahiro Yokokawa) discovers a kappa he adopts it and names it Coo (Kazato Tomizawa). Despite the strange surroundings Coo is warmly welcomed by the Uehara family as they do all they can to help Coo find a place in modern society.