Lost key of magical realm

A Girl with a strange birthmark on her neck...
A kingdom beyond imagination seeking the key to the cure of the only heir to the throne in the magical realm hidden by the human world ...
This is the adventure of the marigold who lost her way back home, on the night of her mother's death she suddenly disappeared in front of the big ancient tree, how would she survive in a strange place, when she was born an ancient spell make a bound between the Marigold and Prince of krurotopia Kingdom.