勇者、辞めます　～次の職場は魔王城～

Leo Demonhart ends the war by wiping out the Demon Queen's army, and the newly peaceful human kingdom repays him by treating his inhuman strength as the next thing to fear. Homeless and purposeless, he turns up at Echidna's castle with a résumé and asks the queen he just beat for a job. Her realm is short of both staff and money, and Leo's battlefield instincts translate surprisingly well into fixing that while he works out what she was really fighting for. This is the original light novel behind the manga adaptation and 2022 TV anime.