(WARNING!! 21+ CONTENT) In a fractured realm still scarred by an ancient cataclysm, where northern winds carry the bitter taste of ash and forgotten glory, Heldia von Agilrach survives as little more than a beautiful shadow. Once the cherished daughter of a proud northern house renowned for its swordmasters, she lost everything in a single day of fire and ruin. At nine years old, she left her young twin sisters playing in a hidden cave... and returned to a world consumed by flames. Ten years later, the last remnant of her fallen lineage toils as a lowly servant in a noble estate, her striking cyan braid and piercing red eyes drawing both unwanted desire and cruel suspicion. Enduring endless humiliation from those who now rule over her, Heldia clings to a desperate plan. She is willing to pay any price—including surrendering her body for seven forbidden nights in the dark corners of the estate—to obtain a rare and dangerous substance known only to healers. A poisonous resin that could be the key to unlocking the latent power flowing within her veins. But the past refuses to die quietly. Whispers of the great burning that destroyed her home speak of something far more sinister than mere disaster, and the mana stirring beneath her skin hints at a destiny drenched in vengeance and magic. In a world where obedience is a chain and survival demands sin, how far will one broken noble daughter go to rise from the ashes and reclaim what was stolen from her? A dark tale of lost nobility, forbidden bargains, simmering revenge, and the fragile bond between sisters that even flames could not sever.