Because I'm... a hero! The journey of Tooru, a boy in the fourth grade of elementary school, who was sent to another world, begins now! The flying furball and guide to the other world is the rather "useless" familiar Luu. If he takes his name literally, he is definitely a great magician, but unfortunately, Faldio is a "self-proclaimed" one. And the hero who was summoned to the other world - Mikami Tooru (a fourth grade elementary school student). This mismatched party will be able to complete the adventure without a hitch! ...There's no way they can do it!? (At the end of the volume, illustrations and comics that were published on the cover and front cover of the original book are specially included as "digital version extras"!!)