Ojarumaru Yakusoku no Natsu Ojaru to Semira Movie
English name: Prince Mackaroo the Movie: The Promised Summer - Ojaru and Semira
Genres: Adventure, Comedy, Fantasy
Type: Movie, Episodes: 1
Aired: Jul 15, 2000
Studio: Gallop
Source: Unknown
Rating: G - All Ages
Synopsis:
A short film introduces Semira, a strange boy who comes to play with Ojaru and his chums and bears a marked resemblance to a boy of the same name who spent a summer with the village elders when they were boys, long ago.

(Source: AnimeVice)