Therefore, an idea comes to mind, that there is a room hidden somewhere.
The house was made to be symmetrical.
If we go looking for a part that's not symmetrical, we might find something.
I thought so, and tried looking for a dubious place while checking the floor plan on both floors, but I couldn't find anything.
I mean, the inside of the house is too dark.
Even if there was something unusual, it may go unnoticed.