Shiromajo Gakuen is a secret garden that accepts girls who have been emotionally injured. Moga becomes a white witch after receiving training and leaves Shiromajo Gakuen to save the world, but a white witch, Rina, appears in front of her. Also, black witches, who are hostile to the white witches and are attempting to create a new world with a spell, appear in front of her. Later, Moga sneaks into Kuromajo Gakuen to save Rina after she was kidnapped. There, Moga sees a girl who once stayed with her at Shiromajo Gakuen.