August 16th is the halfway point of the long summer vacation. The third-year junior high school students Nagara and his group gathered at the school were suddenly involved in an unprecedented situation. Not only Nagara himself, but also the mysterious transfer students Nozomi and Mizuho, as well as Asakaze and 26 other classmates, are drifting in a different dimension with the school. And while drifting, they also gain various "abilities". There are people who are happy because they have acquired abilities beyond ordinary people and use their abilities to cause chaos, and there are also people who lead the students as leaders and desperately find a way to return to their original world. Mutual doubts, uncontrollable jealousy, and the desire to dominate have caused confrontation. Faced with a series of difficult-to-solve events, the boys and girls are suddenly thrown into a life of survival. Can Nagara and his friends conquer this world and return to their original world safely...?