In "Rude Miss Young Ae Season 14" Ko Se Won acted without thinking. This infuriated his mother-in-law as she was constantly angry at him. Ko Se Won's mother-in-law was always the type that would bug him about not having a job. As he doesn't have a job, she was always getting on his case about not making a living and always leeching off of his in-laws.
On the episode of tvN "Rude Miss Young Ae Season 14" (script Myung Soo Hyun, director Han Sang Jae, Yoon Jae Soon) broadcast on September 22nd, Kim Hyuk Kyu (played by Ko Se Won) went through a lot because of Kim Jung Ha (played by Kim Jung Ha). Kim Jung Ha realized that she had been a bit too harsh on him. With that, she asked him what he wanted to eat for the holidays.
After thinking for a bit, Ko Se Won had an endless list. He was requesting for more and more until Kim Jung Ha finally said, "This is why you're not liked. How can you not get this? How are you so immature? You should feel lucky that you're getting meals at all. You're living with us. You're really annoying me."
