The Royal Pain.

A princess and a demon mysterious love. More like a forced love by the parents decision for both kingdoms. The Lucitors people were on good terms with The Butterfly people. Both kingdoms were very powerful. But The Lucitors and The Butterflys wanted more power than they already had. They were on such good terms, that they came to a conclusion. Both Family Kingdoms had kids. The Lucitors people had the prince, Tom Lucitor. As for The Butterfly people, they has a beautiful princess, named Star Butterfly. Both Kingdoms came to the agreement, that they would introduce their kids to the other family kingdoms. There was the royal tradition, to make 2 kids meet each other, so they could instantly be destined to get together, and that is what they wanted with the prince, and the princess. The problem would be, what would happen if that beautiful princess, Star Butterfly hated the prince Tom Lucitor, since the beginning of the relationship?.

I guess you will have to read to know all about this mysterious dark love.