I feel like people are treating Aya and Haruki like defenseless babies when they're barely even underage.
I'm not gonna excuse Kurosaki's behavior, but if Aya didn't wanna deal with people like her, she shouldn't have gone on a dating app, of all places, to make friends. I don't know about you, but I don't believe for a second that someone would be foolish and desperate enough to keep letting themselves being used just to "have a friend", instead of just saying no and moving on.
Not to mention she already has Haruki and her friends, whom it seems like Aya's taking for granted. On that note, I also find it weird that they've been friends for so long, yet only now does Haruki somehow come forward with her feelings towards Aya, and in a pretty shitty way too. I guess maybe the events might have made Haruki realize she's got feelings for Aya, but still.
Also, if Kurosaki actually wanted to rape Aya, she would just have done it immediately without giving a shit about how Aya feels. This doesn't feel like a situation where Kurosaki would abuse Aya despite what she wanted, at least to me. And if anything, I think Kurosaki's relationship with Yoru left her in a terrible position where she ended up incredibly starved for both physical and emotional affection, which she's now taking out on Aya. (again, I'm not trying to excuse her behavior)
I think all the girls are having it rough, and even though what Kurosaki's doing is messed up, I think simply labeling her as a "rapist" and nothing more is pretty shortsighted. But then again, you guys are the experts, right?
Also, that got a bit long. Apologies.