Mizuki Konno is a typical high school junior. While she may not be one of the class elites, Mizuki is fortunate to be on the right side of her class' idols. But when Mizuki's diary is discovered before a class fieldtrip, tensions reach new heights. Then, tragedy strikes in the form of a traffic accident. Almost everyone has been wiped out and the five remaining girls are injured and lost in the wilderness. They also hate each other and begin to assert their wills against each other to try to survive while enacting a new class structure not governed by looks and style.