Lee Yu Jeong, known simply as Yujeong, is a South Korean singer, dancer and member of LIGHTSUM (라잇썸). She graduated from Seoul Performing Arts High School, and before debuting, she spent time as a trainee at Stardom Entertainment, Fantagio Entertainment, and CNC School. She was a cheerleader for 5 years. She made her debut in June 2021 as the group's sub-vocalist (and she is now the current maknae) with their first single, "Vanilla". They are managed by CUBE Entertainment (큐브엔터테인먼트). (Source: MyDramaList) Watch drama online for free.