During a break, Kazimir walks over to taunt Karou in front of her friends. He teases her about her tattoo: "the one that says Kazimir, right over [her] heart" (2.71).
She unbuttons her sweater (maybe Karou can be the next nude model?) and reveals the top of her chest: no tattoo.
Kaz is baffled that it somehow disappeared. How did she get it rid of it?
Karou leaves the room to fill Zuzana in on her breakup with Kaz.
Playing with the string of beads around her neck, Karou has an idea at how to get him back. Actually, it's an idea as to how to get back at him—as in revenge—not get himback, as in to her apartment for a sleepover.