Hey 
I saw that this has already been solved, but for future overlay needs from Episode given backgrounds, I made an entire drive folder of overlays for their unusable backgrounds that don’t have overlay to match. Including this one where I also made a window/wall overlay so you can put people outside the class lo
Here’s the link and I don’t require credit. If you want to, a readerMessage Overlays by ColeCatalyst is perfectly fine for me.
And if you see one I’ve missed or new ones that need them, feel free to comment on my thread and I’ll make them for everyone to use.