Responses
Spoilers...
Lee Sejin A is not in the same situation as moondae. But he also has his own personal problems which will be highlighted later on in the story. There is actually another idol that is in the same situation as moondae and we'll get to meet him in probably the next few chapters, but his identity is revealed after quite some time. He's an older idol btw and from a very famous group.
I feel like Lee Sejin A also has the same situation as Moondae. Just a guess cause from what I can remember in the last ch, he talked to him like he knew why Moondae has to debut or smth. Hmmmm who knows... I just want the next ch updated tmr TwT