Responses
Because he saved him. Cleared his debt, gave him a job, gave him a place to live and paid his grandma's hospital bill. It's pretty similar to live bombing, and if you add that he is very popular and talented and respected... It's easy to fall for him even if he is a douchebag.
I don't know why but Kim Dan is disappointing me, how can you fall in love with someone that treat you so badly