Yeah, I'm really looking forward to Yumi's purity route cause I just wish it could be Akira doing nice things for her, you know? Can you imagine?
This town has two halves turns into a romantic setting when Akira has the impulse to kiss her, but instead of doing it, he stops and apologises for getting caught up in the moment and that leads to her thinking about him in a romantic sense.
Then he helps her with finding a job, and they keep getting closer, and then with getting back with Yuki - I don't even know if Nodoka would attack her on that timeline because Yumi would probably have given up on bullying way earlier with Akira by her side - but yeah, if it did, Akira would protect her 100% - then when she gets him for christmas it actually IS a love letter, how cute would that be.
Anyway, I want a love story with the tsundere, with lots of dere, wholesome teacher moments and okinawan turtles.
Edit: Also, Chika would probably be dating Rin in that timeline since Yumi was "closer" to Akira way before her.