Vocalist Kim Seyoung and drummer Choi Wookno have joined as new members later, but Kim Seyoung leaves the band due to health problems after first five performances.
[4] The Monotones posted a recruitment announcement to find new vocalists, and Hoon Jo sent them demo tapes to apply it.
[5] Park Hyeonjoon left the band while recording their first studio album, and Ha Seonhyeong joined as a new member.
[9] They supported the concert of Liam Gallagher and Foo Fighters in 2017.
[10] They were about to release their documentary film Into the Night in 2018, but members Choi Wookno and Ha Seonhyeong were involved in sex scandal rumours, and the band announced their disbandment with the suspension of the release of a film.