5-members AB6IX officially made they debut yesterday (22 May) with a fan showcase held in Seoul. In conjunction with their debut showcase, Warner Music Malaysia held a Private Debut Showcase Screening at GSC Nu Sentral exclusively for AB6IX fans in Malaysia. Hand banners were given and 150 fans who attended the debut showcase screening left heartfelt messages to AB6IX on the banner. 

AB6IX members are well known before their official debut as Park Woo Jin and Lee Dae Hwi previously promoted as members of Wanna One, while Lim Young Min and Kim Dong Hyun promoted as the duo group, MXM. Jeon Woong, however, was a former trainee from YG and JYP Entertainment. He previously had a short appearance on the battle between YG and JYP trainees on "Stray Kids" competition program. 

On the same day, AB6IX released their dynamic debut mini album called "B:Complete" which consists of 7 tracks including the title song "Breathe". "Breathe" is a trendy tropical deep house track that conveys the message of wanting to escape and be free from the pressure of the society. It's produced by Dae Hwi and co-wrote by Young Min and Woo Jin. Not only the title song, this mini album will also featured the members self-produced, composed and written tracks.