A Korean woman depends more on her family for support than a western woman.
After dating a Korean girl, many men get “Korean Fever”.
They know as a foreigner in Korea you attract a lot of attention and they may assume that you must have many girls chasing you.
They will certainly start any relationship with suspicion. Early on, you may find that your new girlfriend will want to check your phone for evidence of you seeing another woman.
A lot of Korean women hate Korean traditions and culture which tend to favor Korean men. When you start to date a Korean woman, they may already be thinking of marrying you and returning to your home country one day.
I suggest you be clear early in the relationship about your future plan about returning home and if that plan includes her.