LOL: What is an AD musician

"Time Travel Diary for Season 6" "My name is Jiang Shang. I traveled through time and became IM's starting AD carry, helping the team successfully advance to the quarterfinals." "We faced SSG in the quarterfinals and were eliminated, but my cheat code was fully loaded..." "Oh my god, there's something wrong with the cheat code, it needs a condition to activate..." "I didn't want to do this, but I still remember Chigou's arrogant face. Damn it!"... "EDG Coach Diary" "I'm EDG coach Nofe. I just joined the EDG team and I've found myself being fooled." "Deft and Pawn left the team, Clearlove missed the Spring Split due to a broken heart, and we don't even have a proper AD carry..." "Musician? I know him, IM's starting AD carry. Although I heard he had some minor conflicts with the starters, we can't let the mid laner substitute play AD carry, right?" "We won, but something seems a little off..."