konjiki no moji tsukai - yuusha yonin ni makikomareta unique cheat. in a fantasy, rpg-like world ravaged by warring countries and racial injustice, the human kingdom summons five japanese high schoolers from 21st-century for aid in their war with the demon clan. the students will hone their skills in defending human kingdom of edea with their mmorpg experience at their fingertips.
this is not their story though.
out of the five students, four had the hero title and the fifth had the innocent bystander title. since he sat near the other four, he had been accidentally summoned. his name is hiiro okamura, an introvert bookworm whose raison d'être is traveling and reading. in this aggressive war with the demon, hiiro thinks it's useless to help the human kingdom. realizing that he is not a hero and has no true responsibility to help them, he wants to leave the kingdom and go on his own adventure.
not long after, hiiro finds out he has a very special word magic skill: a magic that can materialize a word's meaning. as he travels more, he discovers various uses for his word magic and various opportunities to find books, level up, and earn some of his own. even with the outbreak of war on the horizon, hiiro remains true to his desire to fly across the new world in which he is.