Alma Tandouji lives a lonely and solitary life in a certain port city within the Kantou region. One day, he is approached by Aiba Ruri who asks for his help, for the power of the Sacred Seven which resides within Alma. However, Alma turns her away. In the past, Alma had hurt people with that power. Since that moment, he had foresworn it. But when the peaceful city is attacked by a monster, Alma reluctantly decides to use the Sacred Seven. However, his powers go berserk and the situation becomes even more dire. At that moment, Ruri comes to his aid by inserting a sacred stone made using her jewel necklace and transform him to his true form.