It'd been so long since he's played with someone--and even then it'd been with an orchestra, his own sound buried amongst the other strings. The duet feels oddly intimate, with two different instruments mixing their voices together. It's a little scary. A little beautiful. A little uncomfortable. A little strange and a little welcoming.

So when Kaworu asks him, Shinji hesitates.

"Yes." The word drops softly from him like a pebble into a lake, heavy with the words he doesn't know how to say. He meets his gaze, gives a little smile. "It was..."

Different? Warm?

"... new. To experience, I mean. I've never played with a piano before."