Sejeong comes in and tells her sister that she has heard from her cousin, Hyunsoo, that she and Yeoh are living together. Yeoh has told her that he is her cousin and that she should not tell anyone about it, but when she sees Yeoh, she realizes that something has happened between her and her cousin. She tells Yeoh that she will tell Yeoh at school the next day, but Yeoh says that she just forgot to wear her dress, which is not good, and she will wear it right away. She wonders why Yeoh visits a man who is alone at night, and asks how she can find her office. She tries to ignore her, but she ignores her and leaves like that. She asks Yeoh why he didn't tell her that they were living together