Yukari is on patrol around the school because she heard a doubtful rumor. She finds a tag stuck onto a desk in a classroom and tries to tear it off. But Shizuka, her classmate, stops it. Yukari still tries to tear it off and she finally makes Mai, who just passed by, tear it off. From that day, some mysterious and erotic phenomena occur.... It's beyond Yukari's understanding. Shizuka's suggestions are always erotic. Mai always becomes a target girl of the monster because she is easily get possessed....

Yukari is on patrol around the school because she heard a doubtful rumor. She finds a tag stuck onto a desk in a classroom and tries to tear it off. But Shizuka, her classmate, stops it. Yukari still tries to tear it off and she finally makes Mai, who just passed by, tear it off. From that day, some mysterious and erotic phenomena occur.... It's beyond Yukari's understanding. Shizuka's suggestions are always erotic. Mai always becomes a target girl of the monster because she is easily get possessed....