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On August 16th, when the long summer vacation was already halfway over, a group of junior high school third-year students, including Nagi, gathered at school and suddenly found themselves caught up in an unforeseen situation. Not only Nagi himself, but also the mysterious transfer students, Sora and Mizuhara, along with their classmates, including Asakaze, were swept away into a different dimension along with the school. While drifting in this alternate dimension, they each gained various "abilities." Some, elated by their newfound, extraordinary abilities, began to recklessly use them to their advantage, while others, acting as leaders, desperately sought ways to return to their original world. Suspicion, uncontrollable jealousy, and the desire for dominance led to conflicts. Faced with one unsolvable event after another, the young boys and girls were suddenly thrust into a struggle for survival. Will Nagi and his friends be able to navigate this world and return safely to their original world?