On December 24, 2018, a teaser was released on Cosmic Girls' social media accounts revealing the album name and the date of release. It was later revealed that members Xuan Yi, Cheng Xiao and Mei Qi would not partake in promotions and preparations for the release due to Xuan Yi and Mei Qi's promotions with Rocket Girls 101, and Cheng Xiao not being able to reschedule her prior engagements in China. Afterwards, it was revealed that there would be a Show-Con held at 8pm on January 8, 2019 at the YES24 Live Hall.
On December 26, a schedule for their upcoming comeback was released on social media platforms, confirming that there would be a schedule everyday leading up to the comeback. From December 27, 2018 to January 1, 2019, two photo teasers were released each day. The first pair was Bona and Eunseo. The following day, the teasers for Soobin and Luda were released. Next were SeolA and EXY, Dawon and Yeonjung, and Yeoreum and Dayoung.