Shin could just hear the piano music in his sleep, and maybe that faintness is what made his mind start to wake up so he could investigate. Sure, Adrien played often enough, but if Adrien knew he was still sleeping he wouldn't play one of the pianos that could be heard from Shin's room.

Besides, it sounded different than Adrien's playing. There was something about how the player's fingers must be lingering on the keys, he's guessing. It was different from Adrien's crispness. He stands up and heads to the piano room the song had to be coming from, still wearing his pale blue cotton pajamas bottoms. For once his hair is flat and there's no piercings in his face or ears. He gets to the door and peeks in, having already realized the phantom musician must be Joss. He smiles a little to see him there, lost in the music.

It was good they brought him back.