I mean, i get for some reason he stop when about to say something like "all along ive thought of u as a girl" and decided to be a jerk instead, but none of that justify why shes so obsessed with him, even if he was a someone important in the past he betrayed her.The worst is that she completely hide it about the whole thing from her actual boyfriend and if Masumune dont interfere in the act now she most likely would lie again later. Thats really an awful habit she has to fix.