There is said to be a city of angels high in the clouds, away from the ruin of mankind. They are known for their pristine beauty and limitless bounds of kindness.
Another world exists beneath the human world. It is said to be the underworld of demons. They feast on the weak and leave bloody trails of vast destruction wherever they may go.
The angels cast out the demons, making the two natural born enemies. Or at rare times the angel will try to change the demon's ways by doing what they do best; trying to help them. Which in the end is noted to always cause a wretched broken angel with their wings torn off or a death-bound demon. The tales are said to never end well as the different species are made to destroy the other.
This is the story of an angel sent from the sky to help a lost one. Will their story end in tragedy as all other tales, or can the two of them change destiny forever?