On May 19 KST, KNK revealed the official track list for their upcoming single album Gravity!
The album features four songs including an instrumental and their title track will be titled Sun, Moon, Star as hinted at in their multiple concept photos. All the songs were composed, written, and arranged by Kim Tae Joo.
However, for each song each member has chosen a five-word phrase for each song. For Think About You, Seungjun wrote, As pretty as a star, Youjin wrote, When I think of you, Jihun wrote, What are you thinking about?, Inseong wrote, You are so cute-cute, and Heejun wrote, My heart is beating fast.