he is first received media attention as a trainee under YG Entertainment, when he was preparing to debut as a member of Big Bang. He appeared in 10 out of 11 episodes of the Big Bang Documentary, but he wasn't chosen to be a part of the final group formation by YG's president.
He received a lot of concerns from management when BEAST was being formed, as the first thing the members were instructed to do was have Hyun Seung gain weight.
Until now, still many fans questioned he with his failure entering Big Bang group. But it has already been the past. Now, he has a good career in Beast.