A tunnel that gives you anything you want sounds like wish fulfillment until you realize what the movie is actually about: two people so broken they don't know what to ask for. The animation doesn't just support the story, it carries the weight of it, turning a rural Japanese summer into something that feels like a memory you're trying to hold onto before it disappears. What hits is how brutally it compresses grief and regret into ninety minutes, then refuses to let you look away.

Kaoru Tohno seems hard to pin down, and his past is marked by trauma: he lost his sister Karen in an accident five years ago, and his parents are divorced. After a bitter clash with his father, he ends up in front of a strange tunnel in the remote countryside, and it draws him inside. He comes out carrying a bird just like his dead pet, only to find that a week has gone by while he felt he was inside for minutes. Rumor calls it the Urashima Tunnel, a passage that grants what you want in exchange for years of your life. When Kaoru goes back, he finds that Anzu Hanashiro, a new transfer student in his class, has followed him. Anzu is struggling between the ideal image she holds and how she really feels, and she has a wish of her own that only the tunnel can grant. She proposes they experiment with it together. The film is a supernatural romantic drama set over one summer, weighing the price of getting what you want.