Gravity, Completed

On May 25, 2017, KNK released a single album titled Gravity which contains "Think About You", "Love You" and its lead single "Sun, Moon, Star". The group promoted the album from May to June.[3][4][5]

On July 7, YNB Entertainment made a surprise announcement of KNK's comeback with a new album, a reissue of Gravity titled Gravity, Completed, set to be released on the 20th. Three days later, a promotion plan schedule and individual image teasers of the members were revealed.[2][6][7] On July 12–13, individual video teasers of the members were released, while the music video teaser for the title track titled "Rain" was uploaded on the 14th.[8][9][10] On July 17–18, the track list and a preview of the album were unveiled respectively, revealing that KNK's member Youjin wrote and co-composed the second track titled "Good Night", while the third track titled "Feel So Good" was written and co-composed by Heejun. All other tracks were produced by Kim Tae-joo, who has been working with KNK since Awake era.[11][12] The album was officially released on July 20, 2017. It was also released as a digital download on various music portals.[13]

KNK held their comeback stage on the July 20th episode of M Countdown.[14] It was then followed by comeback stages on the July 21st episode of Music Bank, 22nd on Show! Music Core, 23rd on Inkigayo, 25th on The Show and 26th on Show Champion.[15][16][17][18]