Square Up is the first Korean mini-album by BLACKPINK. It is available in two versions and contains 4 tracks, with "Ddu-Du Ddu-Du" and "Forever Young" serving as the album's double title tracks. "Square Up", which means "stick together" and "prepare to fight", has a message of "let's stand up to the challenge", exploring a mature concept. The album was released digitally on June 15, 2018, and physically on June 20, 2018.
 
[Contents]
1 CD 
+ Photo Book 
+ Renticular Lyrics 
+ Random Photo Card 1EA 
+ Random Selfie Photo card 1EA 
+ Double -Sided Poster 1EA (First Press Only)