When i read this, i remember Rebirth so much. However i can tell the differences between the two MCs. Where Rebirth's MC has someone who cares for him from the very beginning (the goddess) so he can turn into a better person who can forgive whereas in this, the MC didnt have anyone with him, someone he consider as family raped him (his own bro different mother) and the person he loves has too much pride in him to think about someone else's sake.
Despite of that, the emperor truly loves MC and want to change the past. Even tho the story is very well wirtten........ I wont say much anymoreᕦ( ͡° ͜ʖ ͡°)ᕤ
Palace of Bardo