A few months have passed since I got married and started living at my husband's parents' house. I was nervous at first, but thanks to my kind father-in-law, it now feels like a familiar home. However, there is one thing that is strange. There was a strange atmosphere in my father-in-law's room at the back of the second floor, as if to tell me not to go near it. One day, I had some business to take care of that I had to go out until the evening and returned home earlier than expected, when I heard a faint moan coming from my father-in-law's room at the back of the second floor.