Stage Name: Jiahn (지안) Birth Name: Yoo Young-doo (유영두) Position: Vocalist, Dancer Birthday: April 1, 1992 Zodiac Sign: Aries Height: 176 cm Weight: 57 kg Blood Type: B
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– He dislikes his chubby cheeks because the other members like to tease him because of his cheeks. – He was ranked #5 in Boys24 with a total of 52.15 points. – He was in Unit White and Unit Black. – Jiahn and Yeontae were part of Def Dance Skool before joining Boys24.
