The protagonist is going into a building where there is a mirror house and another attraction. The building is now abandoned and he is going to another place different from the mirror house to meet someone else.
It's night and there are no lights.
Once he stepped in, on the other side there is the mirror-phobic big labyrinth which is nothing but a shadow of it's former self which is now standing in front of Souichiro but.
I don't understand that half a day in there.
Since it's night and the building has been abandoned I think it's because half a day there is no sunlight so it' all dark and so it serve no purpose, but I am just guessing.
Can someone clarify?