[3] The album jacket photos of the individual members were released on July 15 and 16, 2012, which introduced the urban pop boy concept for the promotions.

The song was composed by Jeon Daun, who also wrote G.NA's "Because You're My Person" and K.Will's "Struck Dumb", along with B.A.P member Yongguk.

The second single, title track "No Mercy", is composed and produced by Marco and Jeon Daun of TS Entertainment.

The repackaged version of the EP, entitled Crash (대박사건) and its title track were released on August 30, 2012.

The song is the work of Duble Sidekick, and has a British rock base mixed with guitar sounds.

Non-promotional album track "Voicemail" is a hip hop-ballad song and the first by the group that is entirely written by member Yongguk.

The video highlighted the change in looks of the group members from street gangsters to "pop boys" but keeping true to their upbeat artistry and charismatic image.

The music video for "Crash" was released on August 30, 2012 through the official YouTube channel of TS Entertainment.