My best guess at the dialog:
Aya: ...Huh? Chizuru...? Why are you here...?
Chizuru: Well...Koga-san kind of...gave me tickets for the concert...
Chizuru: I mean huh? What? Did you hear me? What's with you...
Chizuru: Huh? Wai...
Chizuru: Oiii! You're not coming in? It's a band you like, no?
Aya: Not really. You don't care about them, right, Chizuru?
Chizuru: Aya?! You know what? Right now, I'm really...worried about you!
Aya: .....!
Aya: Thank you...(I just...want us all to get along, and yet...)
Aya: For a while, I've been kind of on a cloud. I even caused you lots of trouble.
Aya: But...even though we had a promise...hic...Koga-san you're a fucking liar!
Chizuru: Why...
Koga: (I hate this.)
Chizuru: Aya...I'm so sorry...
Koga: (I can't stand the idea that because of me, you two had a falling out.)
Chizuru: (It's not you Koga-san. All of this is my fault.)
Aya: ?!
Chizuru: If you're going to be mad...just fucking go and get mad in front of Koga-san!
Chizuru: (It pisses me off, but...this is my way of repaying you, Koga-san.)
Chizuru: Aww...geez!! And that it's a totes good song pisses me off too!!
Lyrics: Can we all back it up? Can we all give it up?