Shinsadong Tiger
Most of the EP's six songs were written by Yong Jun-hyung; "Beautiful Night" was written by 4realz, Goodnite and Sleepwell, the first time Beast did not use a song produced by Shinsadong Tiger as its lead single. "Midnight" was written by Yong Jun-hyung, Choi Kyu-sung and Shinsadong Tiger, and "Not Me" was written by Rado and Jun-hyung. "When I Miss You" was written by Jun-hyung and Choi Kyu-sung, and "The Day You Rest" and "Dream Girl" were written by Jun-hyung and Kim Tae-joo. A Japanese version of "Midnight" (Japanese: ) was scheduled for release as the group's third Japanese single.