The hero who saved the world from the demon king's terror lost his purpose and was burnt out.One day, he saves a beautiful red-haired girl who is chased by a mysterious group and is in a predicament.Even if you ask the girl she saved, the purpose of the mysterious pursuer is unknown, and she herself has lost her memory, and all she remembers is her "name"!?When things like this happen, the only people you can rely on are your former friends who defeated the Demon King together.However, if the girls are all well-matched and have strong habits, their love will also be heavy...A slapstick re-life fantasy begins in which a carefree retired hero traces the past of the most addictive party and a mysterious girl!