Cinderella at 2 AM

The Business Trip (1x4)

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An unknown number keeps texting Yun-seo's phone with messages only an ex-boyfriend would text, making her suspect Ju-won. When she confronts him about it, she makes a fool of herself. Meanwhile, the company's new venture in the vacation sector opens a hanok getaway where Yun-seo's team and Ju-won go for a business trip.