NCT U is the first sub unit of NCT. This sub unit has non-permanent members. But interestingly, NCT U can be said to be a unifying member of the other sub-units, namely NCT ​​127, NCT Dream or WayV. Neo Culture Technology or NCT has several sub units. Each sub-unit has different members and even has a unique concept. NCT's first sub-unit, NCT U, debuted in 2016 with the single The 7th Sense and Without You. At the time of debut, NCT U consisted of NCT's Taeil, NCT's Ten, NCT's Mark, NCT's Jaehyun, NCT's Doyoung, NCT's Taeyong. But according to the concept, NCT U has members who change. This is what makes the NCT U sub unit so unique and interesting.