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HAPPY BIRTHDAY, Seol Yoon-ah! 🎉🎂 To the prettiest Sullyoon, may you enjoy your day to the fullest. We cannot wait to see your debut on stage next month! We love you so much! 💗 #겨울의꽃_설윤아_생일축하해 #19th_winter_with_Sullyoon #HappySULLYOONDay #설윤 #SULLYOON