As much as I'd like to know other's feelings and interpretations to the story, there is just too much to read.
I'd like to point out a few things though (it's very possible that others have already, but oh well), the last few lines the MC says are VERY important. Why? Because the MC knows senpai will only follow her if she's unobtainable, she knows this because she went through the same exact thing.
I also like the parallels of chapter 1 starting with through the eyes MC (the vulnerable one) and then ending with senpai (the player). Then chapter 2 starts off with senpai (the now vulnerable one) and then the MC (the now player).
For those taking a side, I understand. I'd like to say that both are not so good people though. Senpai has changed, but she has done irreversible damage to the MC (even though she denies that it was her fault). It's kind of ironic that they both changed, which was directly caused by the other, but basically switched roles in the relationship.
All I can say is, if a teacher assigned an analysis of Murasakino stories, yuri fans would have a field day.