Brave Story

From Tokyopop: When 14-year-old middle-schooler Wataru's father leaves home and his mother is taken ill to hospital, he decides to change his fate by traveling through the magical door shown to him by his mysterious classmate Mitsuru. In a land of magic and monsters, Wataru must summon all his courage and embark on a journey with several comrades to meet the Goddess of Destiny and change this "mistaken fate."