[6] In September 2016, she released her first solo soundtrack for the South Korean drama Shopping King Louie, entitled "The Way".

[citation needed] In November 2017, she took part in King of Mask Singer, participating in two rounds until she was eliminated by Sunwoo Jung-a.

[11] In 2018, along with member Sanha from the boys band Astro, the singer was chosen to host a talk show for the youth audience entitled Yogobara.

[16] In October 2020, Umji appeared with Eunha on the show Knowing Bros and showcased a tip of the single "Mago" from GFriend's studio album 回:Walpurgis Night released two weeks later on November 9.

[17] On October 6, 2021, it was announced that Umji, along with former GFriend members, Eunha and SinB, have signed a contract with BPM Entertainment to debut as a trio.