Match Made in Hell.

Once you hit full maturity, about 19, you get a mark, a scar almost, that appears on your skin. And whoever has the same mark is your match. Not everybody can find their matches right away, but fate will be there to give a helping kick in the arse. Usually people are happy when they find their match, ecstatic even. But not 19 year old Andrea, especially when they didn't get off to such a great start. But things are just gunna get worse.