itch.io

I'm not sure I understand your problem, but the only other route beside the Sweet Route is the Friend Route (> w <)
In each characters main route you can gain either points for the sweet route (which appears on screen in the characters color, blue for example for Ikki, red for Toshio, etc) or the friend route (which points appear in Aya's color, yellow).
I don't know if it was the answer you were waiting for though, so maybe it didn't help at all xD

P.S : The friend route is less detailed/advanced than the sweet route, so I tend to say to people that they don't miss a lot if they only play the sweet one (é o è)