Yeah, okay, barring some kind of decent twist/explanation (or shakily written asspull, let's be fair), I think I hate Hana.
Maybe she'll actually be just a harmless but taunting jerkass, or the framing and perspectives are deliberate choices to make the reader think along a certain path and she was totally an all right person all along. And besides, we're only a few chapters in.
But I don't like how she treats people, and I don't like the trajectory being established.
Same, though I still kinda hope Hikaru and Harutaka amicably break up? Hikaru clearly has a lot of respect and gratitude towards Harutaka, but I just don't see a shred of romance there. To me at least, she reads as never having understood what love was supposed to feel like on account of her one actual love being labeled as childish affection, leaving her to assume her strongest opposite-sex platonic relationship must be love. Like, so what if Hikaru does get over Hana? That just means sooner or later she's going to catch feelings for someone else, and they're going to go through all this again. Continuing with the relationship is just going to keep hurting them both.