God I know exactly which one you're talking about, BUT I FORGOT THE NAME, NOOOOOO(╯°Д °)╯╧╧
FOUND IT, HAHA, IT WAS ON MY READING LIST AFTER ALL
https://www.mangago.me/read-manga/kill_the_lights/
Is it not in your saved? https://www.mangago.me/read-manga/kill_the_lights/
Dunno if I'm the only one who thought the guy's original body was way more attractive T-T
NOOOO, YOU ARE NOT THE ONLY ONE. Man, I love manly bottoms.
I read it years and years ago so i vividly remember
But basically the ML is a famous dude (?) who have a strong older dude body guard
But then the body guard died and REINCARNATED into the famous dude RIVAL (who is an actor and life was messed up) and is our MC
Now here's the thing, the famous dude (ML) actually LIKES HIS BODY GUARD (MC before reincarnation) 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 (ML) most hated person/Rival and how to convince him to not hate him and change his reputation into the better