I am a small fry and can only train villains

After traveling through time and space and becoming a small fry who takes care of the eldest daughter of the Duke's family, the first thing he did was to watch his own eldest daughter offend the protagonist because of her own death, causing himself to become cannon fodder? Jupiter was numb.
Special training! If you don't exercise ten kilometers today, you are not allowed to eat! Ten years later, the villain eldest daughter was successfully trained.
It's just a little different from what he thought. "That little princess just winked at you, right? I'll go and settle the score with her...