As some fans pointed, the photo seems to have been taken during the SMTOWN GALA Charity Night 2017 with VOGUE and UNICEF.

< 2018 S.M. GLOBAL AUDITION > * KOREA * Apply now: 2018korea@smtown.com #TVXQ! #동방신기 #東方神起 #SM #2018SMGLOBALAUDITION #GLOBALAUDITION #KOREA #CHINA #INDONESIA #VIETNAM #JAPAN #USA #CANADA #THAILAND #CHILE #ARZENTINA

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Credits:

@smaudition_: 1 and 2,
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