Hajime Nagumo, a typical seventeen-year-old otaku, has his mundane existence upended when he and his classmates are whisked away to a fantasy realm to fulfill the role of heroes. Unlike his peers who wield immense powers, Hajime is relegated to the humble position of a Synergist with just one transmutation ability. Subjected to ridicule and mistreatment for his perceived weakness, he grapples with despair in a hostile world teeming with monsters and demons. Can he endure the challenges with only the skills of a mere blacksmith?