Here's one extremely unique cover you don't come by often - Golden Child's Bomin and Joochan covering Seventeen's upcoming OST, "9-Teen" for web drama 'A-Teen' season 2!

Fans of the popular web drama series know that Golden Child's Bomin currently plays the role of the mysterious heart-stealing transfer student, Ryu Joo Ha, in season 2 of 'A-Teen'. On the other hand, Seventeen are well-known as the official voices behind the main theme song for the 'A-Teen' series, starting with their hit OST "A-Teen" for season 1 of the series released last year. 

In light of the long-anticipated premiere of 'A-Teen' season 2 last month, Seventeen will be singing another OST titled "9-Teen" - the official closing theme of every 'A-Teen 2' episode!

Plus, back during episode 8 of 'A-Teen' season 2 which aired this week, Seventeen's Joshua also made a special cameo appearance as Ryu Joo Ha's close friend. See why the Golden Child members' fun cover of "9-Teen" is special?

Check out Bomin and Joochan's skilled cover of the 'A-Teen 2' OST above, while you wait for the full song to be out online this May 19 at 6 PM KST!