Yarinaoshi Reijou wa Ryuutei Heika wo Kouryakuchuu GoGoAnime

Jill escapes from prison the night before she is to be executed by her fiancé, Crown Prince Gerald. She is hit by an arrow while escaping, but instead of dying, she is transported six years into the past, to the night she met Gerald. In a desperate attempt to change her fate, she proposes to the first man she sees, Hades Teos Raphe, her future enemy. This is her last chance to make things right!