Su-ji and U-ri

The Siblings (1x75)

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U-ri witnesses Ma-ri treating Sun-young rudely and confronts her in anger. This causes Ma-ri to feel deeply disappointed in Jin-tae for not supporting her. Meanwhile, Jang-soo plans to invest all his savings in Do-young's potential as a superstar, and Do-young confesses his feelings to Doo-ri. Su-ji expresses frustration to U-ri for treating her like a little sister so naturally, as if their romantic relationship meant nothing.