About the Login Bonus Corium

It's a shame it's only the walls, floor, and tree~ Right now, I'm using last year's wall in my Corium, but I wish it had a ceiling too, since it's already so nice. Since it's a room-type wall, I'm struggling because none of the ceiling parts I have really match well🙄 Sometimes, I find myself wishing there was at least a ceiling and a pot...