Before debuting in BACK2UP she was a dancer in 1Million Dance Studio, she was very known becuase she appeared in many YouTube videos as a center.
There's nothing much known about Yejin because she was scouted from a YouTube video from 1Million and the company nor herself shared info about her pre-debut years.
She debuted with BACK2UP as the Lead Dancer, Lead Vocalist, Visual, Songwriter on February 15, 2023 with their debut 1st Mini-Album ''Brand New Woman'' and the title track ''PANDORA''.
She was praised for her visuals when they recently debuted and got casted on many commercials at the time the calls for her to be on commercials was so high, the agency had to set a limit for how many commercials Yejin could do per-month.
She was given the nickname, milliondancer, after fans discovered her 1Million Dance Studio videos.
She debuted as a Lead Vocalist, Lead Dancer & Rapper of the co-managed sub-unit ''Cherry-Up'' next to her BACK2UP member Aliah and Cherry Bomb's members Aerin & Mary
She is very popular for being very tall.
She has said that she wishes to do runway modeling one day.
