In the midst of a growing worldwide emergency, a unique school designed exclusively for first-year orphaned girls offers a glimmer of optimism. However, once the students attend the welcoming ceremony, they are in for an unpleasant surprise. What they do not know is that the school is a laboratory for turning parentless children into lethal weapons. Before being admitted, each girl is given an injection that unleashes animalistic powers and abilities. Sadly, at the chaotic event, Tachibana Karin witnesses her closest friend's murder, and she must fight to survive in the merciless and turbulent environment of her new life at the school.
