During a typical school day, Tsukuru and his classmates find themselves suddenly whisked away to a different world. To their surprise, they end up at a hero auction where nations compete to acquire heroes to battle the demon kings ruling various lands. While Tsukuru's peers are swiftly auctioned off with powerful roles, he is unfortunately labeled as a 'Chef,' a seemingly worthless job. With no bidders for his unique skills, Tsukuru is unceremoniously ejected through a transfer gate leading to a region teeming with formidable monsters...