Aka：致允熙 / Moonlit Winter / 致潤熙 / Для Юн-хи / Księżycowa zima / ユンヒへ / Trăng Sáng Mùa Đông
Summary：Yoon-Hee lives with her teenage daughter Sae-Bom. On a winter day, Yoon-Hee receives a letter from Otaru, Japan. Sae-Bom accidentally reads the letter and learns about her mother's first love, which she never spoke about before.
