Tainted Magic, Tainted Blood ~ TSAMS AU

This is a D&D Style AU but like, also not??

Y/N is the Princess of her beautiful kingdom, destined to fall in love with not one, but two lovely brothers - Sun and Moon. Their love is deep and powerful - anyone would be able to see it. Including their jealous older brother, Eclipse. Sun and Moon both dislike their older brother, thinking him to be nothing but selfish and greedy.

Eclipse decides he wants to get back at the brothers, turning to blood magic. He summons none other than BloodMoon himself - the renowned demon that has the power to grant whoever summons him whatever he may wish, as long as he gets to satisfy his bloodlust in return.

But Eclipse won't settle for just gaining power - he wants to make Sun and Moon suffer. And what better way to do so than to marry the princess himself, become King, and change everyone's memories of the twins?