Yoo Seung Woo and B1A4's Sandeul have dropped their sweet collab track "Oppa".

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As previously reported, the song is produced by�Brother Su�and features his characteristic rhythm along with a cool hollow guitar and playful bass. Yoo Seung Woo and Sandeul sing about the moment they find how sweet it is to be called "Oppa."

Check out the "Oppa" MV above!