Kare First Love features the kind of tropey set-up I really personally dislike. Karin is super nerdy, mousy, has no real friends, and is a constant target of bullying. Understandably, this makes her really suspicious and even a little hostile to any popular person that acts nice to her, as she's had so many bad experiences, she can only assume they're making fun of her or have some other ulterior motive. However, this also means that's she's basically completely unlikable, with no redeeming features except surprise, surprise she's just so cute when she's not wearing glasses, as if somehow glasses can somehow trick everyone into thinking she's just so ugly. For some reason, Kiriya alone notices how cute she is, and even though she continues to be a little hostile, he's just so interested in pursuing her, I guess mostly on the basis of she's just so cute when she's not wearing glasses. For some people this might be fun wish fulfillment, but I personally can't enjoy a romance where I can't understand why one of the characters would be so into the other. The other thing about this one that's a turn off for me is the focus on bullying, which is rather realistic and therefore can be hard to read.