[1] AlphaBAT originally debuted in 2012 as a duo (Kyumin & Selin) under the agency YUB Entertainment.

Selin, now going by the stage name "I:ota", continued as a member of AlphaBAT, which grew from a duo to a nine-member group under the company Simtong Entertainment.

Later, the boys released a second Christmas-themed digital single Surprise Party, revealing the official name of AlphaBAT's fandom: "Alpha".

[2][3] Although their first performance was November 12, 2013, it was revealed that AlphaBAT would soon make their return in late February 2014 with their first mini album: Attention.

[4] As announced on November 1, 2016 via AlphaBAT Japan's official Twitter, AlphaBAT has appeared to have switched companies from Korean label Simtong Entertainment to Japanese label Jakol Corporation, along with the (unofficial) departure of members C:ode, D:elta, F:ie, I:ota, and youngest member J:eta who enlisted on November 9.