2AM's Seulong and Yoon Hyun Sang have something up their sleeves, and we can safely assume that it will be one heck of a collaboration! 
SEE ALSO: [FAN EVENT] We're giving away tickets to Jackson Wang's 'MAGICMAN 2 WORLD TOUR' in North America!
A teaser image was released showing the two artists looking thoughtfully into the far off distance. It's a simple enough teaser and gives us just two small details of the collaboration title, which is "A Day Something Will Happen," and the release date, set for February 16 at 12pm KST.
What do you think this collab will be like?
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