Ziel Grisel (Nijisaki Ken) manages to defeat the fallen god-king in divine war. But he was cursed by his last opponent and lost all his emotions. Ken decides to create reincarnation magic by using his innate ability to dispel the curse. 900 years have passed, and Ken has been successfully reincarnated. Unfortunately, the curse cannot be removed, and Ken is forced to live in that era without his emotions. After learning that fact, Ken is determined to live a quiet and peaceful life as...Butler?