NCT Dream is a South Korean boy group. Their theme is teenagers and they graduate from the group once they reach the age of maturity (20 years in korean age, 19 years international). They are the third subunit of NCT. They officially debuted on August 25, 2016.
They originally followed a graduation system. However, on April 14, 2020, it was announced that Mark would be brought back following the release of Reload, on April 29, and the subunit will be following the rotational system of NCT U's.