Theatrical edited version of Summer Pockets following Tsugumi Wender's storyline from the anime series.

Tsugumi Wenders, a girl who lives in a lighthouse on an island, has to return to a distant land when summer ends. Tsumugi, along with Hairi and Shizuku, decides to spend the rest of her summer vacation searching for what she wants to do.

(Source: TOHO Cinemas, translated)