It's interesting there is two full bathrooms on the second floor, if you look at the floor plan, as if both bedrooms are effectively en suite. Only one bathroom photographed, I wonder if one of the parents continued to live there and has now passed.
I'm fairly fascinated too now. There is something not quite right, all the rooms have two singles apart from one. I wonder if the owner has lived there since he was seven.
It's like a house in two parts, some unused, empty, unloved and then the living areas and garden clearly cared for.