yoosung (the maknae) may know about the drug issue since jaeyoung may have told him. remember when they sleep at the dorm during their anniversary and he asked jaeyoung what happen between him and the silver haired guy (jun) ? we didnt see the conversation but i guess jaeyoung just told about the drugs. None of the members seems to know that Jun is a drug dealer
And there’s one more detail that makes this connection even more interesting: Jun contacted Yoosung because Yoosung had actually reached out to him first, asking for his help with Seungmin’s investigation into the H-100 drug (Chapter 32). That’s why Yoosung finally contacts Jun at the beginning of Chapter 37. So the conversation between them wasn’t random at all.

So is he calling the silver haired guy? Do thy get along well? I assumed they kinda knew what happened?