[he's still reeling from the praise (it feels warm; his heart is beating fast in excitement), and it's moving him to sit up again in front of the piano. he needs to calm down, first and foremost, which is why what comes out in song is a slower and softer melody, one he has played several times before.]

I practiced every day for years.

[it helps pull him back into taking things easy.]

I've done a lot more piano songs that ones with lyrics in them. [a pause as he focuses on the music] Like this one.

[and then he plays, quiet, until he ends the song on a long note.]

... [then, turning to rin] I have ideas for more, but I didn't think they'd be worth it to continue composing them.