There is none.

Cheerleaders serve as ring girls who often chant vulgar language and urge the fighters to kill one another, some times by holding a card that says, "Kill the Bitch."

The girl fighters dies in many brutal ways.

There is a fight between a principal and teacher that leads in a fatality.

There is a scene with a shooting inside a school.

All of this is told through audio of the book reader, so nothing is seen visually.

There are several use of Bitch, Shit, Damn.

Few uses of shit, bitch, damn.

The entire setting is inside a school which may be triggering to victims of school disasters as well as the girl fighters lack morality and willfully participate in this mess all while their parents and school officials gamble against them and broadcast their fights over the dark web.