Kurata has such a cute trait, when she blushes, her whole face and body turns red. It makes me think she might never be able to get used to love :)
Also I don't think this manga will turn super toxic. Judging by how Kurata described Kira, "when you think she'll laugh mockingly, she puts on a kind smile instead", it seems like it will stick to lighthearted teasing and the blushing trope. But its to early to judge. ¯_(ツ)_/¯