Among the class that was transported to another world, Nagumo Hajime is an ordinary male student who doesn't have ambition nor aspiration in life, called "Incompetent" by his classmates. The class is summoned to become heroes and save a country from destruction, students of the class are blessed with cheat specs and cool job classes, but that's not the case with Hajime, his job class is a "Synergist" and his stats are very normal (mediocre). "Synergist," to put it in another word is just the artisan class. Being the weakest, he then falls to the depth of the abyss when he and his classmates are exploring a dungeon. What did he find in the depth of the abyss and can he survive?