This is a real thing that happened to my friend. Her house had an inexplicable stench, and she got a bad cold when she got home. She still doesn't know the reason. Originally, there was a lot more that should be explained in this story, but I was too timid to think deeply, so I wrote it in a hurry and in a somewhat fragmented manner. From the time I finished writing it until I opened the document for the first time just now, I didn't even re-read it myself. After all, I am too timid to touch this kind of subject matter, so you readers will laugh!
Conception: