Seven Days War / Bokura no Nanokakan Sensō
Plot Summary: On the day before summer vacation, every boy in a first-year class of a downtown Tokyo middle school disappears. Was it some accident? A mass kidnapping? Actually, the boys holed themselves up in an abandoned factory on the riverbed. With support from the schoolgirls, the boys start a revolution against the adults from this “liberation zone.” The new anime film shifts the settings to Hokkaido in the year 2020.