"You are not the heroine who appears in that game... but Mimosa Southern Cross, the wicked villainess who obstructs her romantic path!!" As a child, Mimosa learned from her mother, who revealed herself to be a 'reincarnator,' that this was the world of an otome game, and that she, Mimosa, was a villainess destined to be executed as a criminal in the future. From that day, Mimosa's mother, possessing rare skills unique to a reincarnator, and Mimosa, who inherited them, began their daily struggle to avert death flags. However, her beloved mother, just as the game's scenario dictated, passed away, leaving Mimosa behind. Through days of fending off harassment from her stepmother and stepsister, and facing the greatest death flag that stands in her way (the Second Prince), Mimosa, with her mother's teachings in her heart, sometimes retreats, but always confronts them with all her might. "Mother, I'll do my best!!"