The fan-base has written a very nice conclusion to this manga that ties all the loose ends together. I will post an announcement once its done. Look forward to it!
Nanjo said that there are no traces of the chain being cut i think. Its quite ambiguous there. in fact this whole manga has speech bubble issues. We dont know who said what.
I think Beato's reds applies to rooms in the houses not the warehouse. they won't lock Natsuhi and Jessica in a warehouse if they can just unlock it from the inside and leave...