The Sorcerer Lord 

Hans, a vassal who managed everything for the lazy Count Adrian, dies in an ambush and awakens 15 years in the past in Adrian von Kallista’s body. In this timeline, Hans no longer exists, and Adrian is a 15-year-old who once ruined his house through mismanagement. Determined to change that fate, Hans, now living as Adrian, sets out to properly rebuild and guide House Kallista through proper leadership and magic.