The Almost Legendary Shannon

A modern-day American teenager pulls Excalibur out of a stone and becomes the future king of the world. Only she'd rather read a good book, or watch paint dry, or get her teeth pulled. Excalibur and the legendary Merlin the Magician have great plans for her — which Shannon will do everything she can to screw up. Especially when she falls in love with the man whom she is destined to kill in order to save the world.

Note: The series was first published by Go!Comi before the company start licensing manga internationally.