Liza Fortin is the second princess of the Imperial Kingdom, where the power of a different ability is considered a sign of nobility. She grew up being scorned as an “incompetent princess” because she had no different abilities. She was troubled by her handicap and label as the only one in her family without different abilities, but she did her best to fulfill the official duties imposed on her by her brothers and sisters, who did whatever they wanted. One day, Lisa's mansion is suddenly engulfed in flames. Her siblings, jealous of the fame she is gaining despite her incapacity, plot to assassinate her. However, she finds herself back in time to one year before the assassination. Lisa, who has returned to the past, decides to take revenge on her siblings who used her and abandoned her, and asks her estranged childhood friend Theodor Reuven, a knight, for his help. The incompetent princess, who has been exploited until her death, begins her thorough retaliation against those who are addicted to their power... (Machine Translate)

Original Webtoon: Comico, Yahoo Book