The ordinary lifetime of 17-year-old otaku Hajime Nagumo is disrupted when he and his classmates are summoned to a phantasy world and tasked with saving mankind. While his classmates are gifted with impressive abilities useful in combat, Hajime is belittled for less than gaining an inferior transmutation skill that lacks any real offensive power.
During an expedition within the Great Orcus Labyrinth, Hajime is betrayed by one among his classmates, plummeting him to rock bottom of an abyss. Though he survives the autumn , Hajime is faced with menacing monsters and misfortunes that send him spiraling into a grim nightmare. wanting to live and return home at some point , he resolves to fight for his survival only to satisfy an imprisoned vampire he names Yue, who is additionally seeking to flee the labyrinth. Taking an interest in him, Yue and a couple of others along the way accompany Hajime on his journey to seek out how back home, while steadily transforming from commonplace to the world’s strongest.