Brave Story: New Traveler (2006)

On a day that starts out like any other, an 11-year-old boy's life is changed forever when his friend Miki suddenly collapses from an unknown illness. Without the means to save her, he grows increasingly distraught when suddenly, a strange voice offers him a second chance: "Beyond the door you can change your destiny!" He soon leaves the real world and journeys to the world of Vision, where, as a novice "Traveler," he will surmount myriad ordeals in hopes of ultimately meeting with the Goddess of Fortune to have a single wish granted.

Storyline

"Based on the manga Brave Story, Tatsuya, a grief-stricken boy is transported to the "Vision" world where he must battle foes and make friendships in an effort to save the life of his friend Miki, who is struck by an unknown illness."