The three named above were
Back in 2016, Kangin, Jinwoon, Lee Chul Woo, and Jung Joon Young also worked together for JTBC's 'Hitmaker.'
On the April 2 airing of SBS' 'One Night of TV Entertainment,' the producers reached out to the suspected stars' agencies for comment.
Jinwoon's agency stated, "Jinwoon is in the military. He hasn't been transferred to a base yet. He's in the training center so it'll take a while to confirm. We didn't know they were acquainted outside of the filming."
Lee Chul Woo's agency stated, "There's nothing confirmed. We do not know. We're looking into the matter but we haven't received any clear statement on it."
Meanwhile, Kangin's agency did not answer the producers' calls.