Set in the "Kirisaku" Japanese private institute ("私立霧索高等学校", "Shiritsu Kirisaku Kotogakko"), the game talks about a sudden massive zombie invasion of the school. Just five young girls managed to survive but they have to hardly fight against hordes of horrific zombies with a large amount of weapons from common Baseball bats to powerful machine guns, sniper rifles or rocket launchers. Each characters has her own skills like special martial arts. When the girls are in serious danger they can throw their costumes to zombies to diverte zombie's attention. The game has been target as 17+ in Japan for violence and sexual contents. Through multiplayer service, 5 players can play together.
Source: Wikipedia, "[en.wikipedia.org/wiki/School_Girl%2FZombie_Hunter School Girl/Zombie Hunter]", available under the CC-BY-SA License.