Desperate Mrs. Seon-ju

A client who lives here, Jeon Nam-jin? (1x16)

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Seon-ju tries and fails to catch the woman Nam-jin is having an affair with, and Nam-jin makes Seon-ju furious with his nonsensical excuses. Sang-ah, who was running away hurriedly, is caught by So-woo in front of Nam-jin's studio apartment. Seon-ju receives multiple calls from her clients.