 The extended play was the unit's first major release to feature member Jaemin since their debut single "Chewing Gum" in August 2016; following his medical hiatus since early 2017.SM founder Lee Soo-man served as the EP's executive producer, with songwriters and producers such as Kenzie, MZMC, Bazzi, Mike Woods, Kevin White, August Rigo, The Stereotypes, Deez, Erik Lidbom, Cazzi Opeia, Anton Ewald, Simon Johansson, Sebastian Thott, and others participating in making the album.It was also their last release with the original seven-member line up, marking the graduation of member Mark in December 2018 as he reached the age of adulthood in South Korea.