Ah, the room behind the sane lady leads to what's depicted in the 2nd screenshot of the gallery, except that you can freely move inside.
That said, once you try to exit it, you're kicked into some strange place (picture provided)
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Wandering in this new zone and getting "caught" by a living doll/kid with green hair made Urotsuki warp to a closed room (picture 1 of the gallery)