The Arrival

Chris Mauve is a completely ordinary teenage boy. His life is uneventful and boring until he accidentally finds out the secret of his classmate, Mercury Sephtis.
He discovers she comes from a world unlike his own, and that it's falling apart at the hands of a terrible curse, a fearsome witch, and a highly anticipated war.
He must aid Mercury and her family in order to put a stop to all this madness, or their world as they know it is eternally doomed.