Here are some I have watched:
Arsenal Military Academy - Army along with some crime and investigating. Some romance
Come and Hug Me - Investigating, and crime. Romance
Go Go Squid! - Computer engineering (Is more interesting than it sounds lol), Romance with a singer
Love O2O - Gaming company, Romance
Perfume - Fashion. With a twist of fantasy and romance.
Psychopath Diary - Crime. No romance but so so good.
The Beauty Inside - Actress and a manager of a company.
Touch Your Heart - Law and romance
What's Wrong with Secretary Kim - Owner of a company and his assistant
Intense Love - Two doctors. An actress an her assistant.
Lucky Romance - Gaming company
Melting Me Softly - Entertainment industry. With fantasy, Sci-Fi and romance.
She Was Pretty - Fashion magazine
The Brightest Star in the Sky - Music industry