6 days ago 
According to label Chrome Entertainment on June 12, "A new 4-member rookie boy group named Blue Zone Boys will be making their official debut on June 17. Blue Zone Boys, made up of Bon, Choi Tae Woong, Double.D, and Jung Seung Hyun, will deliver a bright and refreshing energy to the public. We ask for your abundant love and attention."
Even before their debut, the Blue Zone Boys have been promoting actively in Japan, Thailand, etc in order to hone in their performance skills. The group is headed by former 'Produce 101' season 2 contestant and former MMO Entertainment trainee Choi Tae Woong.
Meanwhile, Blue Zone Boys's label Chrome Entertainment is also home to Be.A, as well as former Crayon Pop member Ellin. The label is known as Crayon Pop's original label before their disbandment.
Look forward to Blue Zone Boys's debut, coming this June 17! You can also follow their official Twitter account, below.
안녕하세요 #크롬엔터테인먼트 입니다. #청공소년 (#靑空少年)의 공식 트위터가 오픈 되었습니다. 앞으로 청공소년 (靑空少年)을 향한 많은 관심과 응원 부탁드립니다.감사합니다. #Bz_Boys
— 청공소년 (靑空少年) (@Bz_Boys) June 11, 2019
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Taewoong is the only person I know there. I hope they'll not end with songs like Crayon Pop