Synopsis
Ji-Hae and Soo-Kyoung are attending the same university and both have a crush on Sang-Min. Soo-Kyoung then asks Ji-Hae to do her a favor - write love letters to Sang-Min. Ji-Hae pours out her own feelings for him on paper, but sadly in her friend's name. One day, she finds a secret box full of her mom's first love, which is, coincidentally, similar to her situation.
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