The lead single "Chi Mat Ba Ram" was released in conjunction with the EP.

On June 7, 2021, Brave Entertainment unveiled that the group's fifth extended play, titled Summer Queen would be released on June 17, marking their first new material since "We Ride" in August 2020, and first EP release single Rollin' in March 2017.

[2][3] On June 29, 2021, The Brave Entertainment CEO purposely 'leaked' a snippet of the Chi Mat Ba Ram (Acoustic Version).

On July 9, 2021, Brave Girls released the Piano Version of Summer By Myself as a standalone single.

[5] The Repackage, titled After 'We Ride', was released on August 23, 2021, with the lead single of the same name, as well as an accompanying music video.