GDragon was the one who first uploaded that picture, and after that 'Work' became a hit so Taeyeon uploaded the same thing.
They uploaded this on their snapchat almost at the same time, they even used the same green-eyed filter.
They uploaded these pictures in the same day. GD uploaded it on Weibo and Taeyeon on IG
As expected, they also uploaded these in the same day on Instagramㄷㄷ
-If you're making these as proofs that they're dating then it means I'm currently dating Jongdae right now..
-Isn't it Taeyang.. Not Taeyeon, but Taeyang..
-Omo, Taeyang is Hyorin'sㅋㅋㅋ
-Omo, Taeyang is mineㅎ
-This person must be at least Min Hyorin..
-Taeyeon uses that filter at least once in a day..
-ㅋㅋㅋㅋㅋㅋㅋㅋ Taeyeon is dating me, though?
-Please leave them aloneㅠㅠ
-Why is this so funny to meㅋㅋㅋㅋㅋㅋㅋ
-(The username: President Yang) Jiyong is currently dating me, I have no idea why are you making posts like this on internet. It makes me upsetㅠㅠㅠㅠ
-Kim Taeyeon is mine. Leave Kim Taeyeon alone!
-These look too forced..
-It's Snapchatㅋㅋㅋㅋ If you're making these as proofs then it means that Taeyeon is dating Tiffany as wellㅋㅋㅋㅋㅋ
-The one who writes things like this usually don't know how Snapchat works..
-Who dates in an obvious way like that anymore these days..
-Is this categorized as humor post?
-Hahaha.. So funny^^
-I'm amazed that there are some people who actually believes this..