How am I supposed to get the other random girls events? I can't seem to find a way no matter how many different routes I try it only affects ayumi and haruka but emiko and the secondary characters I cant seem to find a way around
Emiko's first replay is the one in the intro, it might not be save-game compatible so you'll need to replay the intro real quick to get it.
As for the secondary characters, which ones are you not being able to get? One that's easily missable is Suzu's events, which you'll need to interact with the baseball bat at the office to start her events. She has two different replayable events based on which route you take.