Uro Yamada and a 17-year-old girl named Karon both work for the "Hero Retirement and Return to Everyday Life Assistance Agency," an organization that transports heroes from another world back to Earth and assists them in reintegrating into daily life. Karon, a former hero herself, works under Uro as they handle cases. She also lives with him, while Uro constantly fails to curb Karon's hero-like behavior, even as he attempts to instill the habits of ordinary people in her.