“On and Off” is a documentary-style reality show that shows the contrast between the hectic “on” world (work, the stage, etc.) and the private “off” world of various celebrities.

Sunny and BoA would be appearing together on the show. Later, tvN confirmed the news and said, “BoA and Girls’ Generation’s Sunny will be appearing on ‘On and Off.’ The focus of the broadcast is Sunny’s daily life, and BoA will appear as her close friend. Sunny also participated in recording in the studio, while BoA only participated in ordinary filming.”

Sunny and BoA have a junior-senior relationship at SM Entertainment but are also close friends and described as being like sisters.