Jill, once the baggage carrier for a party newly promoted to A rank, is suddenly told to leave for being considered useless. Confused and hurt, she soon learns that without her unique [Storage] skill, the party could lose its hard-earned promotion. As offers pour in from eager new parties hoping to recruit her, one unexpected volunteer steps forward, causing all others to back down. That volunteer is none other than Claire the Thousand-Man Slayer, a legendary S-rank swordswoman who works alone! And so begins the tale of a kind yet powerful protagonist and the strongest swordswoman who recognizes his strength and willingly follows him.