Shim Jaewon posted a photo of Yunho’s rehearsal of Drop! There is a possibility this is from early June because on 170609 Yunho was spotted wearing something similar.

TVXQ UKnow – Drop
Choreo By
@beatburgerjae @mihawkback
Dancer
#이경석Brother
@jack0220
@mihawkback
@soobin1987
@kasper0524
@maxpark85
@langjoonmoon
#정해창
#강길준
#박성찬
#김현규

his track suit seems to be from the brand NERDY (the same he wore its shirt before to osaka):

• NY Track Pants Black / Green: 88,000 won, here.
• NY Track Top Black / Green: 85,000 won, here.

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Credits:

Shim Jaewon’s Instagram (beatburgerjae): here,
Post Written and Shared by TVXQ! Express