Nagishima is one of the islands in the South Sea Islands and is one of the three islands that make up Akizuki. The main city is Kugawa City. It is known as one of the few snow-covered islands in the South Sea Islands.

On the day of the first snowfall, there was a shrine in a mansion in a town called Middle March in Kugawa City.

The dog that had been replaced by the mansion had lonely eyes while looking at the man who was the master who turned his face bright red and angered him. The angry partner was a half-naked man who had been friends with his husband and had hunted and walked with his dog. On the other hand, my husband's spouse was crying.

The dog does not understand why the husband is angry at his friend and the husband's spouse is crying. However, I feel sad when I feel the unpleasant signs around them.

Eventually, the furious master hit a friend with a candlestick. But with her husband's spouse in between, the candlestick hit her head. The husband made a surprised face and left the room as it was. All that was left behind was a stunned friend and his master's spouse with a red liquid coming out of his head. The dog sat beside his husband's companion, who was losing his life with the red liquid, and screamed sadly.

The maid of the mansion later confessed to the police:

... Yes, the owner of this mansion, Count ◯◯, was doing something that would be hard to say to his wife. My friend, Mr. ◯◯, became sympathetic to it and eventually fell in love with him. And Count ◯◯ noticed it and was about to be asked about it on the day of the incident.

At midnight, Count ◯◯ went out in a hurry, so I had an ominous premonition and went to the bedroom.

There was only a fallen wife, Mr. ◯◯ who was stunned and self-defeated, and a dog.