Ni no Kuni: Shikkoku no Madoushi

Ni no Kuni : Shikkoku no Madoushi is a role playing game on Nintendo DS which where you play as a thirteen year old child responsible for the death of his mother. One day a fairy appears to him and gives him a book which should lead him into a mysterious world called Ni no Kuni. In this world, which is actually a parallel world, the little boy discovers that his mother is still alive there. He will therefore decide to save her from her fatal fate.