For the most part, I love this series, but that was just such a dick move. When the teasing is harmless and just to make him flustered I'm fine with it, but she's just a jerk in this chapter. I think this is more common in the early chapters (she's just cruel) and I'm not a huge fan of it. It's like she doesn't genuinely care for him but just likes his funny/cute reactions. I would've liked if she had actually helped him in this chapter (she still could've teased him somehow in the end), cos it just would make them seem more compatible to have an actual healthy relationship.