Baek Yerin is an independent solo artist, lead singer and guitarist of The Volunteers and former vocalist of duo 15&.
Yerin made her debut in 2012 under JYPE Entertainment as vocal duo 15& alongside Kpopstar winner Park Jimin (now Jamie). 15& was active for 3 years before going on indefinite hiatus while both members pursued solo endeavors, officially disbanding in 2019 following a 4 year hiatus and the expiration of both Jamie and Yerin's contracts with JYP Entertainment
Yerin made her solo debut in 2016 with EP Frank.
The Volunteers was founded in 2018