Magic Knight Rayearth Vol. 1

Three girls who couldn't be more different meet on a school trip to Toyko Tower - and find themselves beamed into a parallel world called Cefiro, where the mysterious, captured princess has recruited them to avert a calamity!  With the help of a motley troop of rogues and wizards, they will have to become the legendary Magic Knights and unlock the power of the Rune Gods to save the world...but there's more going on at the heart of Cefiro than they know!