Wow, those actually sent me to a bad place lol because like, is there even really? It seems like for most of the characters the place they dream of is not that far off. If Akira gets better and stops the resets, you could conceivably imagine him choosing whichever character he chooses, but Noriko? I just can't see it happening...
Because the only conceivable explanation as for why he'd choose Noriko over Niki would be because Noriko doesn't have the history. But again, she does. He'd be with Niki's younger sister (Niki would just be there regardless until the end of time, risking glances his way at every opportunity), and Maya's rival, and everything concerning Sekai and Maya and all that happened by being with her...
It's easier with the other girls because either they don't have any history (so it makes sense for him to choose them), or they have history and that's a good thing (like Niki being his support/lifelong love/mother to Ami, or Maya being his crutch/eternitylong love/supernatural partner, or Ami being his actual family). Noriko has all the downsides of history with none of the positives.
The only way I can imagine her purity route is either everyone died or it being an absolute fanfic lol