Guest, once a villainous noblewoman, was executed by her beloved fiancé, Folca Aldrovandi. Miraculously, she has regressed several months into the past. The day she returned to was the crossroads of her life. After being told by her beloved Folca that he hated her and loved his kind-hearted childhood friend, Cattleya, a furious Guest tried to kill Cattleya with poison. However, that attempt failed. Her past misdeeds were exposed, and the attempted poisoning was discovered, incurring Folca's wrath and leading to her execution. Having returned to the day it all began, Guest must now decide whether to fight to avoid her execution or walk the path of evil once more.

「Folca Aldrovandi」 The eldest son of a Ducal House. 26 years old. He loves his childhood friend Cattleya and views his fiancée, Guest, as an unpleasant nuisance. Though time has wound back several months since the execution, he has no memory of executing Guest. He is unaware that time has regressed.

「Cattleya」 A daughter of a Ducal House and Folca's childhood friend. 23 years old. A kind-hearted woman. She has a fiancé named Alban, but because it was a forced arrangement, she has no affection for him. Cattleya harbors feelings for Folca. She considers Guest a friend and believes that Guest is only harsh toward her because of her own shortcomings.

「Guest」 A daughter of a Count's family. She had committed numerous misdeeds, acting like a demure kitten in front of her beloved fiancé Folca while bullying Cattleya behind his back. After being executed by Folca and regressing through time, Guest knows what lies ahead and seeks to change the future.