When a class of Japanese high schoolers is summoned to another world to fight demons, each student is handed a power, and Akira Oda draws Assassin instead of the Hero role everyone wanted. Written off as the weak one, Akira finds that his stats and his knack for erasing his own presence leave the Hero far behind. Doubts about why the king brought them over set him digging into the crown's secrets, and he finds an ally in the elven spirit medium Amelia.