The full-length album consists of eleven tracks, including Japanese versions of three songs originally sung in Korean.

After debuting as a solo artist with the release of Let It Go in 2011, Heo Young-saeng focused on his career in South Korea.

[6] A month afterward, Pony Canyon uploaded a 45-second teaser of Heo's lead track "1.2.3" on YouTube, on September 17.

[7][8] In addition, a launch exhibition was held from September 18 to 24 at Tower Records Shibuya's lounge to promote the album.

[6] When asked how "1.2.3" was written and produced, Heo expressed his admiration of Avril Lavigne and how she inspired his music,[15] stating: "The lead track was created as an upbeat, rock song, letting the listeners to be able to enjoy and dance with it.