The group talked about the album, the title track "Knock Knock" and its music video, as well as their first solo concert which was held on February 17–19 and Asian tour.
Mereka berbicara tentang album, lagu utama "Knock Knock" dan musik videonya, begitu pula dengan konser solo pertama mereka yang digelar sejak tanggal 17 hingga 19 Februari dan tur Asia.