命がけで王国の王子様を救ったわたし。でも花嫁に選ばれたのは裏切り者の義妹のほうでした

In a brief tale, the unfortunate protagonist, Lily Elbert, possessing strong spiritual power as the Duke’s daughter, embarks on a mission to save a cursed prince. After successfully defeating the demon king and freeing the prince, Lily’s body transforms into crystal, leaving her immobile. To make matters worse, her stepsister Marianne betrays her, falsely accusing Lily of being the one who cursed the prince. Marianne is then chosen to marry the prince. Lily endures humiliating days, witnessing the happily-ever-after life of Marianne with the prince. However, when Lily’s resentment reaches a breaking point, the world plunges into darkness, and time starts moving backward, leading to an unexpected turn of events.