Story have it that there once was a demon who fell deeply in love with an angel. He try everything to win their heart to no avail, so in turn he try tricking the angel instead.

Once the angel was within reach the cruel demon torn their wings off. Turning them into a mortal and to be trap by his side with no way to return to Heaven Gates.

The angel was said to go through life time after life time as a human, trying desperately to reunited with their wings, to return to Heaven once more.