Hanatsukihime Manga - Lys was stillborn, so to save her, her mother made a contract with a devil. He marked Lys and lent her his heart, but in return, when she turned 16, he would get it back and he'd eat her body. After her mother died she was found by a wandering minstrel and became a dancer. Now they travel together questing for her devil so she can beg a new bargain in hopes of living longer.
Novel, Manga: Koushaku Reijou no Tashinami OR Common Sense of a Duke's Daughter, characters: Dean, Iris, and ???
Reimei no Arcana (Dawn of the Arcana) - If stories about enemies marrying each other, love triangles and handsome men-- all in a fantasy setting-- are your thing, then you'll like this manga. I'm picky about drawing quality + plot soundness + character/relationship development, so it was quite a pleasure to find a shoujo manga that satisfied all those demands :)