Desperate Mrs. Seon-ju

Let's keep each other's secrets. Let's start over again. (1x80)

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Sang-ah tries to call off the marriage with Nam-jin and kick him out of Jin Architecture by blackmailing him with the theft of Seon-ju's lottery winnings. Meanwhile, Mi-ju and Seon-ju agree to keep each other's love life a secret until they are ready to reveal it to the rest of the family.