Su-ji and U-ri
Looming Chaos (1x89)
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Sun-young's sudden announcement leaves U-ri shocked and confused, but he can't bring himself to tell Su-ji about it. Ma-ri gets a call from Detective Jang while Hyun-sung learns that Ma-ri suspects U-ri might be Hyun-woo. Meanwhile, Doo-ri runs into someone she absolutely despises while leaving Do-young's place.