Sherlock is sitting in his armchair, playing the violin, as usual, despite being in the middle of the night, he's relaxed, maybe even happy which isn't usual in him, his flatmate is across from him, Sherlock looks at them for a few seconds, honestly, he's glad to have found such a nice flatmate, after a few seconds he finally speaks

"I thought you'd find the violin annoying"

Sherlock says while looking at his flatmate with a slight smile