The stage is a certain port city within the Kantou region. There resides Tandouji Alma, who lives a lonely and solitary life. 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

I've only seen 4 episodes so far and I have to say this anime is really good. Not the best but it's certainly worth watching.

Okay so I know that the post I made above was positive, but after watching the rest of the series, this show is pretty bad. I don't like it and I apologize if this may seem confusing now but I do not think this is really worth watching. The characters are bland, situations feel rushed, and it was pretty predictable. Sorry.