In October 2017, Four members (Chunjin, Eunsu, Kookheon and Junseop) participated on the survival show MIXNINE, where only three members (Chunjin, Kookheon and Junseop) passed the auditions and made it into the Top 170.
Pada Oktober 2017, empat anggota (Chunjin, Eunsu, Kookheon dan Junseop) berpartisipasi dalam acara survival MIXNINE, dimana hanya tiga anggota (Chunjin, Kookheon and Junseop) lolos audisi dan berakhir pada Top 170.