The Saint was the Wicked Sinner

Astellyah is the daughter of a Duke and lives a peaceful existence, spending happy days with her family. However, a prophecy hangs over her shoulders, she is a Saint who will accomplish great things with her magic, dispelling darkness through her brilliant existence. Despite that great destiny, she ends up being duped by her sister who usurps her place, accused of murdering her family, she is executed. She then opens her eyes and finds herself in her room, she has gone back in time and is six years old again, how is that possible? She must find it out and prevent this tragedy from happening again, the Saint was truly a vicious woman and to beat her she will have to be much more sly than her. Under her angelic face, she vows to be the worst demon to survive and get revenge. Who of the two Saints shadowed by hatred will win in the end? It will be her, Astellyah swears it.