Their name stands for "You're my best", meaning the group's ambition to become the best in the music industry.
On December 14, 2016, it was announced the group had disbanded.
2015: Debut, new member Hayoon
MyB made their official debut on August 25, 2015 with their first digital single "My Oh My".
After being inactive for the entirety of 2016, on December 14, 2016, Maroo Entertainment announced that the group had disbanded. The agency also announced their plans to debut a new girl group including members Moonhee and Hayoon.
|Heejoo (희주)||Main Dancer, Sub-Vocalist||Purple||2015–2016|
|Jookyung (주경)||Leader, Main Rapper||Yellow||2015–2016|
|Ujung (유정)||Lead Vocalist||Turquoise||2015–2016|
|Moonhee (문희)||Lead Rapper, Visual||Pink||2015–2016|
|G-Won (지원)||Main Vocalist||Orange||2015–2016|
|Hayoon (하윤)||Lead Vocalist, Maknae||Green||2015–2016|