Jill, who belonged to a party that had been promoted to A-Rank as a luggage carrier, was suddenly ordered to leave because he was deemed useless. Jill was at a loss, but it seems that the party Jill left—who possesses the one-and-only skill "Storage"—might have its A-Rank promotion canceled...!? Many new parties stepped forward to recruit Jill, but everyone withdrew due to one particular candidate... Surprisingly, that candidate was the out-of-spec strongest female swordsman, an S-Rank solo known as "Thousand-Slayer Claire"!! The reversal peerless tale of a kind-hearted strongest protagonist and the strongest female swordsman who recognizes his true strength and obediently accompanies him begins!!