Hongbin was one of ten trainees who were contestants in Mnet's survival reality show MyDOL and was chosen to be apart of the final line-up and the 6-member boy group finally debuted with "Super Hero" on May 24, 2012[2] on M! Countdown.[4] During MyDOL; Hongbin was featured in Brian Joo's "Let This Die" and Seo In-guk's "Shake It Up" and "Tease Me" music videos. The "Tease Me" music video was shot alongside actress Son Eun-seo.[5][6][7]