Twelve school girls wake up, all with bags over their heads and their feet boarded and locked to the floor. There are mice and frogs singing, a villain with an obvious limp (well, actually he just drags his foot across the floor) and a strange sense that all of this is a practical joke taken way too far. Every motive is exhausted by the girls, the girls are, Memi Kakizaki, Mirei Sasaki, Mana Takase, Mao Iguchi, Sarina Ushio, Kumi Sasaki, Mei Higashimura, Kyoko Saito, her crush Suki Sasaki,