回帰した悪逆皇女は黒歴史を塗り替える

Ariadne only wished her loving half-brother, Siegbert, to be the emperor...but he betrayed her. But the moment she was executed, she was back in time. Ariadne found herself as a fifteen-year-old girl, before she even met Siegbert. Now she can redo everything...she must avoid that bad ending! In order to survive, she decides to ally Arnold, the first prince. She had poisoned him in her first life, but this time he seems to be in love with her. The brave princess is determined to change her fate...and have her revenge. (Source: BookWalker)