For Yume's route to begin, you need to finish the other five, right? So I've just finished all 5 endings today (Asuho, Komomo, Kosame, Isuzu, and Chinami's route) and started for Yume's route. I followed the steps to get Yume's route but I went to Asuho's. I've tried to replay to see if I clicked something wrong and still got Asuho's route. Also, I didn't see Yume on the O-bon Festival but I saw her in the school gates, the primary school, and on the beach. Why did this happen? Sry for bad English, if any is present.
Edit: I Didn't literally finished 5 of them today, just finished Chinami's route today.