The City of Ultimate Evil [Cthulhu]

My best friend died doing a good deed.

He drowned in a swamp while saving an inconspicuous, gloomy, timid guy.

He actually died for someone like that... someone like him.

It took me a long time to accept what had happened. Then that day came.

Until I saw a long, slender tail-like strand suddenly appear on the man's back, then disappear just as quickly...

I realized something.

My friend had the same kind of wound on his body.

Note: 1. The title comes from the song "City of Evil" by Summer Invasion.

2. The main story is written in the third person.

Theme: Love can overcome fear