Jeong-ha is curious about the relationship between her coworkers Hyeong-won and Su-jin. They once seemed like a couple, so why do they seem to resent each other now? Their true feelings remain a mystery, and Jeong-ha can't stop thinking about them. Then, one day, Su-jin reaches out to her.

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Seung-jun suggerisce di scambiarsi lettere d'amore con la sua ex-ragazza, Wan.

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