The album was released on December 1, 2015, by KT Music, YG Entertainment, School Boy, and Republic.

Psy originally released the title of the album during a streaming on V Live on November 24, 2015.

[2] In the press conference, Psy stated that the single "Napal Baji" is a "fresh sounding retro style funk track with heavy drums and rhythmic guitar lines of the 70s and 80s".

[4] Several songs on the album were described by Psy as parallels to several of his older works, including "Dance Jockey" with his 2003 hit "Champion"[5] and "I Remember You" with his 2012 track "What Would Have Been?".

[7] A tribute to the late Korean singer Shin Hae-chul, the lyrics are based on "talks with him about philosophy and death while drinking with him" which he wondered if "maybe all our entire lives are a dream".