Initially debuting in July 2016, the group's current lineup consists of members Johnny, Taeyong, Yuta, Doyoung, Jaehyun, Jungwoo, Mark, and Haechan.

The group held first headlining concert, Neo City – The Origin, in support of their studio albums Regular-Irregular (2018) and Awaken (2019), as well as their fourth extended play We Are Superhuman (2019).

A reworked second tour promoting their third studio album Sticker (2021), Neo City – The Link, began in December 2021 in Seoul following the reopening of the Gocheok Sky Dome.

NEO CITY – The Origin was the first solo concert tour of South Korean boy band NCT 127.

The tour began in Seoul's KSPO Dome on January 26, 2019, and initially visited 7 cities in Asia.