My read was that they will, she seemed to react when she was told to take the cab with her. I think she just has some kinda bad history and wants revenge, but will learn that she’s not super self centred. Or atleast that’s my hope.
I'd bet money that the story ends happy and this will be a healing/growth journey for the two of them.
The tone from the outset is rather light, comparably, even with Mashiro revealing that she's got some sort of sadistic streak to her. Just going off of Kuroiwa's interactions with everyone else in these first two chapters, the overall mood of the series would need a sharp turn for this to get super heavy and dramatic and end on an unhappy note with the two of them in a healthy (if "top/bottom dynamic") relationship.
As
@BreadBunny indicated above, Mashiro pegs Kuroiwa as some stuck-up superior woman with a chip on her shoulder, and we see in chapter 1 that this is inaccurate and simply the kouhai's presumption. Kuroiwa, for her part, is wholly turned off on the concept of romance, but has also seemingly not given herself a proper chance to experience it--she's dated men before, sure, but she's never allowed herself the physical aspect, and cut things off every time before they reached that point.
But she's also career-focused and driven in a professional sense, and spends her time on that--but is, clearly, quite "innocent" otherwise. That right there is a shift from what Mashiro expected, as you indicated with her reaction to Kuroiwa offering the shared cab ride home.
It's not all gonna be happy and fluffy romcom, for sure - the simple presence of Mashiro's personality and presented reason for pursuing her senpai means that there's undercurrents of problematic behavior, and I suspect Kuroiwa
will be hurt in some capacity by whatever is going to go down between them. But that in itself will be part of the journey for their characters independently and together, and I'd be surprised if part of the author's plan doesn't involve Mashiro herself growing and changing from this pattern of behavior that she's had, and coming to better understand herself, Kuroiwa, and find a happy & healthy relationship between them.
And I think you're right - most of the time, that sort of behavior isn't born in a vacuum, and I suspect that even if Mashiro doesn't have a one-sided history with her senpai, she'll have had something in her past that's turned her on this path. And
her "growth arc" will involve revealing, addressing, and working through it, wtih Kuroiwa's help, toward getting past it and being able to have a stable & happy relationship.
The kicker will be the balancing of the heavy stuff with the lighter stuff, but I don't have any reason to believe the author can't do it based on what I know of their past work. And I dig the more mature feel to this adult yuri romance drama, too, so I'm excited to see where the plot takes them.