From Starry Heaven:

A long long time ago, the wolf king ruled the world.

Ryina is the only daughter of an aristocrat in Bergthis Kingdom. At the first-ever banquet she went to since she was born, she coincidentally met the second prince, Elwin, who had beautiful moonlight colored hair. On the night of the full moon, Ryina and the prince enter the confined ruins, and there Ryina sees prince Elwin change into the form of a wolf and...?!

An old legend containing romance and fantasy!!