官網 http://taeyeon.smtown.com/
YouTube https://youtu.be/s67p8vBJW-s
Vlive https://www.vlive.tv/video/179025
NAVERTV https://tv.naver.com/v/12741337
預告照
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Vlive Happy_TAEYEON_Day♥ 2020.03.09. 7PM (KST)
https://www.vlive.tv/video/178494
數位單曲《Happy》 2020.03.09. 6PM (KST) 公開