Zarina Returns

A girl living in a magical realm at the center of the Earth learns that she shares a mysterious connection with an ancient villainess who has escaped her prison in search of revenge. As a war breaks out between the ancient villainess and the heroes, the girl finds it harder and harder to remain a hero. The connection she shares with the villainess forces the girl to hurt the people she loves. She loses hope, and begins to lose faith in herself. The story ends with the heroes having to turn to a woman who was the villainess's second in command for help.