Debut

NOM released their first single and music video for "Pretty Sister" on September 9, 2013, collaborating with their companion Hwand Min-woo. On the same day, they published the dance practice video of the song, which was choreographed by the choreographer ReflexJun, who also choreographed 'Say It' by Topp Dogg and 'Far Away' by C-Clown. The leader A-IN later revealed that they filmed their music video in China. The song 'Pretty Sister' has received negative comments from fans due to the similarities with SHINee's 'Replay'.

A few weeks later they revealed in their official coffee fan that they would be making their first visit to the Philippines, before their debut stage. They performed shows in shopping centers in Manila and in provinces such as Iloilo and Baguio. They concluded their activities with a fan meeting at Trinity Restaurant Seaside Macapagal and flew to Korea on the same day.

After returning to Korea, they performed their first stage in Show Champion with their song "Pretty Sister" on October 23, 2013.

Dissolution

On February 1, 2016 JM Star Entertanment announced via Facebook that NOM has been dissolved. Meanwhile, JM Star Entertainment seems to be preparing the debut of a new group of guys called " TST ", as their Facebook page opened on the same day that NOM split up. The members A-IN, Yohan and K were seen in the group photo of 7stone along with other trainees.

The group looks like its coming back, with only 3 members (jan, 2019)- ES.Drama.Wikia