Although I am fond of Romance Novels, I am particularly fond of novels that focus on the MC's career! 

Despite this being a recommendation list, I hope you can recommend some good novels too in the comment section that focus on the MC's career too without novels with all the magical elements. 

Small Warnings: 
1. Most novels here have a male protagonist rather than a female protagonist because most female protagonist novels are romance novels that are too OP that it doesn't make sense anymore which turns me off. 

2. A lot of books in this list are not completely translated. However, you can read everything if you read the MTL versions. [Example: Perfect Superstar] 

3. Some books here have a completed status yet it is missing a lot of chapters, you can read the rest of the story on other sites. [Example: Superstars of Tomorrow] 

The list keeps updating as I read more novels and the order changes from time to time since I like to keep things organized.