GFriend was a South Korean girl group formed by Source Music in 2015. The group consisted of six members: Sowon, Yerin, Eunha, Yuju, SinB, and Umji. They debuted with the extended play (EP) Season of Glass on January 15, 2015 and won several female rookie awards, garnering momentum early on despite being from a small company.

Source Music is a South Korean entertainment company established in 2009 by So Sung-jin. In July 2019, the company was acquired by Hybe Corporation, making the company part of the collective term "Hybe Labels". The company manages girl group Le Sserafim, and previously managed soloist Kan Mi-youn and girl groups Glam and GFriend.