プロミス・シンデレラ E1: Hayame Katsuragi was living a peaceful life as a housewife, until her husband Masahiro Imai suddenly asks for a divorce. Hayame runs away from home in shock but has all of her money stolen by a pickpocket, turning her into a penniless, unemployed, and homeless divorcee. A few days after Hayame began sleeping in the park, Issei Kataoka, a rich and handsome high schooler, appears before her. Issei is the son of a luxurious long-established Japanese inn. He invites Hayame to his estate as a way for him to kill some time. In exchange for letting her stay at his estate, Issei proposes that they play games of real life. If Hayame can clear the mission on the die, she will win large sums of money. The game is in poor taste, but she has no choice due to her large amount of debt.