It's basically about the love between Dark Schneider and Arshes Nei that will never be. If you don't like depressing stories well, you're out of luck here.
The world was destroyed and reborn 400 yrs ago, as it turns out Darshu and Yoko's fate were tied together then as well..."You didn't know? She's an Archangel like me. Yoko is Auriel."-Uriel-