All I can guess from ending #6 is that the clowns' plans for total domination worked here (The Joker's laughing gas?).
I agree with the person assuming that Urotsuki is more of a neglected child, even if she has a rather comfy room. Lonely Urotsuki, the puppet show, the Lorn Tower or the egg giving you the child effect seem to confirm this. But this is mere theory.