Ju Haknyeon debuted with The Boyz’ song “Boy,” the lead track of EP “The First,” in December 2017. Before that, Ju was introduced to the public by competing in season two of Mnet’s hit K-pop audition show “Produce 101,” (2017) — Ju finished in 19th place. Under The Boyz, Ju, along with the boy band, has released songs like “No Air,” (2018), “D.D.D,” (2019), “Reveal,” (2020) and “Thrill Ride,” (2021).