A girl living in a lighthouse knows exactly when summer ends, knows she has to leave, and spends her final weeks trying to figure out who she'll be when she's gone. The movie compresses that countdown into something sharp: three people searching for purpose in the time they have left, not to save the world, but to know themselves before they scatter. Summer Pockets earns its ache because it's about the ordinary terror of growing up, the moment when "what do you want to do with your life" stops being theoretical and becomes urgent.

Tsumugi Wenders lives in a lighthouse on an island, but when summer is over she has to go back to a faraway land. With the remaining weeks of her summer vacation, she teams up with Hairi and Shizuku to figure out what she actually wants to do. The film is a theatrical edit of the Summer Pockets TV anime that centers on Tsumugi's storyline, mixing drama, romance and slice of life with a supernatural touch.