Multiplicity

We have a house, and some gardens and woods around it. We all have our own rooms in the house, plus there's a few communal rooms. This place isn't really an other-world in the sense that a lot of systems have them, but rather something we deliberately created in order to have somewhere to meet and talk to each other... however, we do feel by now that it has its own subjective reality, despite existing only in our head. Or something like that.