Spoiler Warning: This post spoils a twist in "Not Your Typical Reincarnation Story."
I read a review of the comic "Not Your Typical Reincarnation Story." The comic falls in the isekai genre: the protagonist dies and is reincarnated as a character in a fantasy story. As in many isekai stories, the protagonist finds herself in the role of the fantasy story's doomed villain, but seeks to change the story to escape her fate. Unlike typical isekai stories, this comic's protagonist finds out that she's the 13th person to be thusly doomed.
As I said, it's an isekai story.
As someone who's had to identify the objects of phobias in a few puzzles over the years, I of course know that the ancient Greek word for 13 is triskaideka (τρεισκαίδεκα).
This leads us to the discovery of a new sub-genre, trisekaideka, a portmanteau packing "isekai" into "triskaideka". Some would say it's silly to define a sub-genre that contains only one work, but this word is too good to pass up (albeit difficult to pronounce).