Ou-sama no Chou

It came about that Uka was introduced to the prince by his royal sorcerer. ------His lover. For one year. Magic temporarily transformed the butterfly prince. But as a promise, that same magic was a curse which would not allow him to regress. The prince made many requests of his sorcerer, his hired "butterfly". It was a year of honesty and peaceful love for Uka. And then, the day came......?