Yeo Chang Gu, commonly known by his stage name Yeo One, is a South Korean singer and idol. He is the lead vocalist of the boy group "Pentagon" under Cube Entertainment. He made his acting debut in the 2016 web drama "Spark". On October 9, 2023, it was announced that five PENTAGON members, Yeo One, Yan An, Yuto, Kino, and Wooseok, have decided not to renew their contracts with Cube Entertainment. (Source: Soompi)

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