Help me with this Manhwa I cannot remember

So the manhwa is about this guy who gets trapped in a different world which is actually a book that he read and his bestfriend is the one in that world. He is some kind of villain or something who buys him from the auction, as he already has read the book so he knows what's going to happen next but sometimes it changes and stuff. I remember his family member appear in the story as some characters like doctor and all. The best friend is rich and I think owns a company which was this other guy's dad's but some story is there. This is all I can remember. Please tell me if someone knows its name.