I never thought I would get to see this animation, or ugoira I guess, on this website (mostly because I didn't know how to upload animated pictures and only normal pictures).

From using Google Translate, it seems Ayase got so excited seeing her boyfriend that she pressed his arm to her chest too hard, and "something" collapsed and she needed to fix it. (I want to try translating this but I'm pretty sure Google Translate DOESN'T equal to accurate translation)