A lot of people are talking about social cues, and all sorts of other tangential aspects.
But this:
Don’t get me wrong I think she was overly harsh and certainly shouldn’t have gone that hard, but I find it difficult to simply say “she’s a bitch” and leave it at that.
But this:
is absolutely correct and her core motivation for her arguement. As well as the fact that he genuinely doesn’t know her and she feels uncomfortable that as soon as having made contact he shoots his shot with reckless abandon. Some people just aren’t into the idea of getting to know your partner as you date, they would rather be in a relationship with someone they are already familiar with, and that’s a personal choice.Then there's the fact that she's right in how forcing Ryuuto to confess as a punishment game is a d!ck move no matter the reasons and they're just lucky it turned out good for them this one time.
Don’t get me wrong I think she was overly harsh and certainly shouldn’t have gone that hard, but I find it difficult to simply say “she’s a bitch” and leave it at that.