The rookie boy group returned with a title track depicting the nervous "Confession" of a boy experiencing his first love, and also performed their other songs from the album during the showcase.
For his impersonation, MJ chose ZE:A's Kwanghee, and you can catch how well he did in the clip above! (It starts some time after the 1 min. mark.) Make sure to check out ASTRO's comeback title track "Confession" if you haven't already!