私は中古住宅を安く買えてとても満足していた。
その引っ越し作業中にこの家の間取り図を見つけたのだが、自分の持っている間取り図となにか違う…おかしい…
そしてその違和感は恐怖へと変わっていく…

I was very happy to buy a used house at a reasonable price.
During the moving process, I found a floor plan of this house, but something was different from the floor plan I had... strange...
And that feeling of discomfort turned to fear...