2NB (투앤비) originally was a duo girl group under Friday Entertainment. They debuted with members Solji & Gahee on March 31, 2006 with their first single album “The First Fragrance”.

In early 2008, Gahee left the group and was replaced with Songyi AKA IRO.

In early 2012, Solji left the group due to the termination of her contract and she joined the girl group named “EXID” in the same year, leaving IRO as the only member of 2NB before the act disbanded completely in late 2012.

On September 2016, the group was reformed under Donuts Culture with brand new members: Son Youna & Kim Hyo Jin.

In mid 2018, Son Youna left the group, leaving Kim Hyo Jin as the only member in the group.

Even with only one member, 2NB is still active with a total of 6 singles released in 2021 under the group name.