The Symbiotic Relationship Between the Rabbit and the Black Panther
The secret life of the demon king
The Secret Affairs Of The 3rd Generation Chaebol
The beginning could have gone another way that would have made this manhwa actually good. Reborn as a rich person, sure, but saving an actress way ahead of time and shielding her from all the harm that could have befallen her if she'd followed her original route makes up for a pretty decent, perhaps even touching love story if done right (even with the smut). But now it's just any other harem story with the MC seemingly not good at anything except being a living dildo to anything with a vagina.
Fuck Buddy