B.I.G's Gunmin x Heedo came together for a set of unit teaser images to gear up for their long-awaited, first B.I.G unit group debut. 

Gunmin x Heedo's unit debut song "Don't Worry" was written and composed by VIXX's Ravi, with the rap lyrics by Heedo himself. The song's message contains hopeful encouragement for anyone chasing their dreams. 

You can listen to Gunmin x Heedo's "Don't Worry" in full this April 10 at 12PM KST.