Jang Myung Sun started her music career in 2014. She was a folk musician when she debuted, but changed her genre to electronic music after seeing a performance by electronic musician Lee Moon.[3] She learned electronic music from Kirara.[4] She released her first studio album, A Premature and Meaningless Confession (이르고 무의미한 고백) on 7 December 2018, which Jeon Daehan of Weiv described the album as of relatively calm synthesisers presenting melodies over the flashing glitch effect.[5] The album was nominated for Best Dance & Electronic Album at the 2020 Korean Music Awards.[6]
She released an EP Dear My Ghost Sibling : Come, I Swallowed All Sorrows (나의 유령 자매에게 : 이리 와, 내가 모든 슬픔을 삼켰어) in 2020.[7] She has prepared a new studio album for 2023, she performed the track from the new album Nature Is You, on Naver Onstage.[4] She participated in the indie project Musician Sports Club with Xeuda, Yeram, Yoonsung, Jungwoo, and Cacophony.[8] Her second studio album Angel's Share (천사의 몫) was released on 3 November.[2]