There wasn't anything about Young Saeng yesterday until few hours before midnight last night fanclubs were tweeting photos of him perfroming at Mnet Super Concert.
Here are fancams of Young Saeng performing 'Out the Club' and 'Let It Go' by rmdkdl uploaded by 501hyunsaeng and HYSmystyle on their respective YT channels.
Here's a clip of Young Saeng preparing for his performance.
This clip is when he's talking to fans before performing 'Let it Go'.
And lastly, a clip of him performing 'Let It Go'.
Another 'Let It Go' performance this time from BestYS.
Did you see his reaction at the end of his performance when firecrackers went out? Cute, right?
Here's a vid from BestYS when Young Saeng was leaving the stage and firecrackers still popping.
I am adding here photos which I lifted from Baidu that came from BestYS.