College student Souji Miyamoto ends up getting transported to another world after test-cutting with a replica sword he bought on impulse.

Because he arrives right in the middle of a hero-summoning ritual in a certain kingdom, Souji is mistaken for the Hero.

By a strange turn of events, the princess discovers that he’s actually a fake. Holding the fact over him that if others find out he’s an impostor he’ll be executed, Souji is forced to set out on a journey to defeat the Demon King.

However, every member of the Hero’s party turns out to be seriously eccentric—each with their own complications…!?

With his imitation-turned-cursed sword in hand, the journey of a fake hero starts now!