[2] This album marks the return of member Jisoo, who took a hiatus after becoming the target of online harassment.

On August 25, 2015, Woollim Entertainment announced Lovelyz would return with eight members, Jisoo rejoining the group, through a teaser image that included the "Lovelyz8" album logo.

[4] A music video for the title track "Ah-Choo" was released on October 1 together with the digital album.

The group appeared on a live-streaming broadcast through the Naver V Live app called "Lovelyz Surprise Party."

That first week of promotion also included additional stages for either a shortened version of "How to be a Pretty Girl" or "Shooting Star.