Wait hold on Jason, "when you wait for Yuzuki to go the boy's wing" ? Is it after crashing the TV and the Camera ? Is Hanbee in his bedroom ?
If so, that is not an interlude phase and this part is actually not meant to be in the demo ...
Besides, I'm currently replaying the game all over again (for the thousand time ;_;) I have fixed the event in which you have access to Yoneno's room, and Yuzuki appearing out of the blue.
If you don't mind, I'll come back to you if I need a few more details :).
Thank you so much again Jason !