I had a feeling those lyrics were from an actual song while I was translating this and I was right. She's listening to 君と羊と青 (You, a Sheep, and Blue) by RADWIMPS.
*Oontz*This girl... That's some amazing noise leaking from her headphones...
And isn't that our uniform? I guess we go to the same high schoolThe feelings I had from when I first found youuu!
Even now they flow through the marrow of my booones!*Oontz*Huh...? I feel like I've seen her somewhere before though...Deja vu?