help i forgot this BL title

I read it years and years ago so i vividly remember
But basically there is this famous dude(?) who have a body guard, but then this body guard died and he REINCARNATED into the famous dude RIVAL (who is an actor and life was messed up)

Now here's the thing, the famous dude actually LIKES HIS BODY GUARD because he save him when he was a kid in an kidnapping attempt (?) But well the whole story goes on how the body guard live his life as the famous dude most hated person and how to convince him to not hate him and change his republic into the better