Double S 301 tease for their 12th anniversary special album!

Double S 301 surprised fans with a teaser image for their upcoming special album, to commemorate the trio's 12th anniversary since debut!

The photo featured members Kim Hyung Jun, Heo Young Saeng, and Kim Kyu Jong smiling together on stage.

'UNISON VOLUME 1', featuring title song "Hello Mello", will be released on June 8 at 6PM KST!