Joo Hak Nyun is the lead dancer, vocalist and rapper of the boy group The Boyz. He appeared in Melody Day's music video for the song ''You seem busy'' (feat. Jung Il Hoon of BTOB). Hak Nyun has a special talent for B-Boying. He can speak Cantonese (his father was from Hong Kong). During Produce 101 Season 2 Hak Nyun was a part of B1F4 together with Bae Jin Young, Park Ji Hoon, Lai Kuan Lin and Yoo Seon Ho because of his popularity.