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A young woman with long dark hair looks off-screen with a surprised expression, then the scene cuts to a young girl in a school uniform standing on a train platform, followed by a boy with spiky hair closing his eyes, then a girl with long pink hair walking down a corridor, then a boy with brown hair looking back in alarm, and finally two silhouetted figures standing on a beach at sunset. The setting shifts between an indoor space with a grid window, a train station, a classroom, a corridor, a forest, and a beach.