NCT Dream had originally launched with a rotational graduation system, where members would leave after turning 20 years old. Mark had been the first to “graduate” from group, in December of 2018, following the release of the holiday single 'Candle Light'.

On April 8, 2016, Mark made his official debut on the K-pop scene with NCT and their minimalist, futuristic hip-hop cut “The 7th Sense” showcasing a then-16-year-old Mark rapping alongside NCT members Taeyong, Doyoung, Jaehyun and TEN as five stars in what would expand into the boy-band collective's current 23-member ...

The Canadian-born rapper, a member of the mega-group NCT (and its sub-units NCT Dream and NCT 127), has been in the public eye for over a decade. In 2012, he auditioned for a Korean K-pop company called SM Entertainment, which was scouting for new talent in Vancouver.