On July 29,Ji Chang Wookand2BiCmade their appearance as guests on 'Yoo Hee Yeol's Sketchbook'.
During the show, Ji Chang Wook expressed that he has many friends who he goes to karaoke with on a regular basis and said, "I go to karaoke a lot with 2BiC amongst those friends." They also mentioned on the show how the three individuals became friends. 2BiC said, "We got to know Ji Chang Wook through a hair salon/shop. We all go to the same one and one day he came up to us to tell us that he enjoyed listening to our music and that it would be nice to share a meal sometimes. That's how we became friends."