Some people say: "Angels are all twins." They are inseparable from each other, no matter they are happy... Or sad. Both people bear it together.
One day, a pair of twin angels violated a taboo. God was furious. Separate the two people. In order to be together, they would rather give up the wings that are most important to them and cut them off. This way they can become mortals... And then... Fall in love...
The blood dyed each other's bodies red... Even at the moment when life was about to disappear, the two people still hugged each other tightly...