Ashita Sekai ga Owaru toshitemo | Episode 1

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The film centers on Shin and Kotori, who are both third years in high school. Shin lost his mother when he was little, and since then he has a tendency to close himself off. Kotori is his childhood friend who always looks out for him. One day, another "self" from another Japan appears in front of them.

(Source: Anime News Network)