Sunwoo

He participated on the KBS2's idol rebooting project show, The Unit, along with his fellow Boys Republic members, but unfortunately, he did not pass the auditions and thus did not become an official contestant. In October 2021, Sunwoo joined his second competitive survival show by SBS TV, Kookmin Singer. He was eventually eliminated but finished within the 'Top 111' ranks (ranks after 40 for individuals were not assigned).