"The Tattered Doormat Young Lady Pretended to Be Dead."

Countess Oriana Ridaut was oppressed by her in-laws and lived a painful life. In that darkness, her fiancé Charles was her only light of hope. She believed in him. She was certain that Charles would save her from this hellish environment. But the result was—— "Oriana! I'm breaking off our engagement!" ——Manipulated by his sister, he saw Oriana as his enemy. Oriana fell into despair and sadness, and then she realized. She must trust no one. Rather than relying on others, she must live by her own strength. For that, she needed the power to protect herself and the ability to eliminate those who would stand against her. With this resolve, what method did Oriana take——!?