from what I can vaguely remember is that it is a regression story, historical(?), and stuff like that. but the body that the mc occupied still has the lingering soul of the original owner but eventually the og body owner has given it completely to mc, and the soul of the og owner completely vanished as she had peace with it.
The empress should have been contented of having such title in the first place, but because of her own greed to desire more power, now all of that "hard work" is what lead to their downfall. RIP ┑( ̄Д  ̄)┍