Lmao
I feel like Morinaga "dumped" her because of the incurable disease. But that wouldn't explain why she's so chummy with the other girl instead? Does she want her to suffer instead? Or maybe she really is just studying with the smart girl. But why is she studying so hard if she has an incurable disease? Maybe Morinaga stopped being her friend because she noticed Akira was able to make some friends (and Akira is kind of a psycho of a friend; either she's stalking her or she's delusional if she knows so much). And why is Morinaga completely ignoring her, even when she throws up and collapses right in front of her?
Also, I need a diagram of that recursive hating.