The Double Life of My Secret Secretary Ep. 4

Her parents forced her into a flash marriage with a stranger who was a CEO, so she fled abroad to escape. After returning home, to avoid her mother's nagging, she disguised herself as a man and became her friend's brother's personal assistant. She then discovered that her boss was the man she had a one-night stand with on her first day back—and he was also her flash-marriage husband whom she had never met!