Seijo Haruto was forcibly reincarnated by an evil god from another world and had a curse placed on his soul. The world he was reincarnated into is one of swords and magic. In this world, one can become stronger by leveling up their combat class, but due to the curse, Haruto cannot level up. Despite feeling hopeless, Haruto discovers that due to the evil god's misunderstanding, he has obtained infinite magic power.