Yami Ochi Seijo wa Senka de Mau

Alicia the Saint had fought with the Demon King's Army, protecting the Kingdom. She had risked her life for the people and sealed the Demon King in herself. However, the Prince, who was her fiance, suddenly accused her of betrayal. He and his mistress, the fake Saint Flaura, had prepared fake evidence that Alicia was a witch. She was arrested on a false charge and was executed in front of people. When she saw everyone wished her death, Alice was thrown into despair. On the verge of her death, she yelled out--"Ruin upon your dammed country!!" The next moment, she was back to life...and the Demon King was in front of her. "Will you marry me?" he asked. With him, Alicia will tread the path of vengeance! (Source: MangaPlaza)