Kanata Kara

A routine walk home from school ends with Noriko falling into an unfamiliar fantasy realm. She survives the transition thanks to Izark, a bold young swordsman who takes her under his protection, though his outward heroism conceals a monstrous power waiting to surface. An old prophecy names Noriko as the key that could set that darkness loose, tying her fate to his. Neither able to part ways, the pair travel together through lands that are as beautiful as they are dangerous.