Su-ji and U-ri

U-ri Finds Na-young Suspicious (1x23)

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U-ri finds Na-young's behaviour strange whenever Su-ji gets mentioned and believes she has a bizarre compulsive disorder against her. Hyun-sung confides in U-ri about how he feels about Su-ji, and Jang-soo's family prepares to move. Meanwhile, Jung-soon becomes furious when she sees a picture of Ah-ra, Woo-chang, and Sun-young together.