The Smile Has Left Your Eyes

The Inseparable Two (1x12)

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Jin Gook tells Jin Kang that he stabbed Moo Young which shocks her. Jin Gook says he can do even worse things if it will separate the two. Without fully knowing why, Jin Kang promises that she will never see Moo Young again. When she meets Moo Young, she realizes that it is irresistable.