Whoo, get ready for the return of three SS501 members in sub-unit Double S 301!

They dropped the first teaser video, which shows some group shots of what is sure to be an epic choreography, but mostly focuses on member Kim Kyu Jong. �The emotionally driven song, "Pain," will probably put a tear in your eye, as well, once it's fully released.

Check out the soothing guitar instrumental above!