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Kim Jun Seo, also known simply as Junseo, is a South Korean singer and rapper under OUI Entertainment. He is a member of the boy group WEi, the project group ALPHA DRIVE ONE, and was previously a member of the project group 1THE9.

Junseo first gained recognition on the boy group survival show "Under Nineteen," where he finished in 9th place, securing his spot in 1THE9. After the group's contract expired, Junseo continued his training.

On October 25, 2018, Junseo was introduced as a contestant on "Under Nineteen," as part of the performance team. He finished in ninth place, thus joining the project group 1THE9. The group officially debuted on April 13, 2019, with the mini album "XIX." 1THE9 disbanded on August 8, 2020, after releasing their final mini album "Good Bye 1THE9."

In 2020, Junseo was announced as a member of OUI Entertainment's new boy group, WEi. He debuted with WEi on October 5, 2020, with their first mini album "Identity: First Sight."

Junseo later went on to participate in the 2025 survival show Boys II Planet where he ranked 8th, securing his spot in the debut group.

출처: kpopping.com