Promise Cinderella summary: Hayame Katsuragi is renowned for her unwavering commitment to fighting injustice. Whenever she sees someone being mistreated, she never shies away from taking action. Until now, Hayame has never faced any adverse consequences for speaking up for what she believes in. However, when she confronts her husband Masahiro about his affair, he shocks her by requesting a divorce instead of apologizing. Fuming with anger, Hayame leaves their home with nothing but a single suitcase. She soon falls victim to a robbery, for which her lack of caution is partly to blame. Stranded and without any shelter, Hayame resorts to sleeping rough in a nearby park. Unfortunately, this only exposes her to more problems as she is confronted by a brash high school student who has a reputation for bullying others. Issei Kataoka is wealthy and enjoys flaunting his privileged status by demeaning others who covet his wealth. Despite Hayame's rejection of his offer of money, Issei offers her something even more valuable – a place to stay at his residence without any rent payment. The catch is that she must participate in his perverse games and relinquish her dignity.