He is a teenager, after, one raised in Japan and probably weaned on the not entirely unmerited notion that he's amazing at music.
[...]
The slight, confused frown on his face evaporates in an instant as he raises his violin. "Any requests?" he asks, mochi forgotten.
You cock your head. "Devil went down to Georgia?" you ask, catching a sharp look from Hitomi.
His brow wrinkles, lowering his violin. "Isn't that a country song?"
"Hey, fiddle, violin," you say, grinning and shrugging.
He produces his phone from his pocket, fingers flickering over the screen.
Sayaka sidles over to you. "What song is that?"
You snicker, lowering your voice. "He's right, it's a folk song," you say. "Fairly difficult to play one, at that."
"Bet he can play it," Sayaka says.
"Oh, I'm sure he can," you agree. "Just his pride~"
Kyousuke nods sharply, setting his phone down - you can see sheet music on the screen. And then he starts to play.
He skips the lyrics, and goes straight for the two fiddle -you mean violin- solos.
... Yeah, he's pretty good, you'll concede. He manages to play the fast, violently frenetic song without missing a beat, on what's presumably his first time.
Sayaka claps loudly the moment he finishes, joined by Hitomi and Nagisa. Madoka, too.
... Oh, fine. You applaud, Mami smiling at you and clapping politely too.