From the introduction:
This is a game that puts players in the default position of having less narrative authority than usual. It also deals with experiences that some may find uncomfortably sensitive. While safety tools, such as the X-Card or Lines and Veils, are always important, they are of particular importance in this game.
This game deals with themes of normatively, particularly allegorically in the fields of gender and social class. There is never any shame in pausing to discuss your needs with the GM or other players, nor in walking away from a game entirely (literally or metaphorically).