Theatrical edited version of Summer Pockets following Ao Sorakado's storyline from the anime series.

While Hairi becomes close to Ao, a girl from the island who always seems sleepy for some reason, he witnesses Ao carrying out a "duty" that has been passed down through the generations of the Sorakado family.

While helping with this "duty", Hairi learns the secret of the "butterfly" and Ao's true purpose.

(Source: TOHO Cinemas, translated)