The EP was released on March 7, 2017, through several music sites, including Melon in South Korea and iTunes, for the global market. On the same day, it was reported that the first music video teaser was given a 19+ rating for inappropriate attire. On March 2, the album cover and track list were revealed through their official Twitter account. A representative from Brave Entertainment stated that they would revise the lyrics and plan to re-evaluate them. The same day, KBS announced that the title track, ' Rollin'', was unfit for broadcast, stating that certain parts of the lyrics contained inappropriate language. The first teaser images, of each member and as a group, were released on February 28, showing a more mature image for the group. The comeback schedule was revealed on February 26.

On February 8, it was officially announced that Brave Girls would be making a comeback in March and the new song would be produced by Brave Brothers, also stating that the recording process was finished and the music video was yet to be filmed. It was also noted that there weren't any intentions to add new members and that the group would promote as a five-member group with members Minyoung, Eunji, Yuna, Yujeong and Hayun. On January 13, 2017, it was officially announced by Brave Entertainment, that member Yoojin would be leaving the group to focus on studies, meanwhile, member Hyeran would go on an indefinite hiatus due to health issues, but featured on the songs ' Reminiscence' and ' Don't Hurry' of the ' Rollin'' album. The group held a crowdfunding effort to subsidize their comeback on Makestar, from September to December 2016, with the scheduled of release the album in March 2017.

Eunji brave girls