 SM Entertainment eventually announced the group would release a new extended play in September 2018, later revealed to be "We Go Up".The label further stated that member Mark would "graduate" from the unit following the EP's release in December 2018, due to him turning 19 by the time, thus reaching the age of adulthood in South Korea.An accompanying music video for the eponymous lead single was released on August 30, 2018, four days prior to the extended play's release.