On July 28, at an interview with news outlet TV Daily, ASTROs JinJin opened up about his connection with Wanna Ones Ong Sung Woo.
JinJin said, He was a senior at my school, and we used to be close. So when he entered Fantagio, I was really surprised. I cheered him on while he was going to be part of SURPRISE [U], but he appeared on Produce 101 Season 2 and gained attention as the slate man. The people around me were surprised as well. Honestly, I didnt know he would become an idol. When he first entered the agency, he was an actor trainee, but because our company aims to create multi-talented entertainers, I think he was able to get the opportunity [to appear on the show].