Had there ever been a case where there were two entrances to one subspace?
Absolutely not; that would go against the whole reason subspaces were created, as they were made specifically to give the main cast a private space to plan things and hang out.
How would it be a private space if some random person could just enter from another entrance?
So... did Ruby have access to my subspace this entire time?
No... Ruby and I had found this painting way before I even stole my subspace from the museum.
Then, was the apple painting the original entrance to my subspace, and the painting from the museum the second one?
...Wasn't this subspace technically Ruby's and not mine, then?
Snapping me out of my thoughts, I heard a growl echo throughout the gigantic room. Turning my head, I saw the black cat sitting on one of the pedestals.