?? Just saying

i think it's the brown-heads dream?

They're doing work and something like that, the prison send them out to go help and work around wherever they need to help or work, thats why they're also wearing different outfits, as you can see they're in the changing room, read back some chapters and you can see them talking about it (づ￣ ³￣)づ

but the tv scene is def some sort of hallucination, right?

I wrote the explanation here: https://www.mangago.me/home/mangatopic/23184149/

Thank youuu