“You want me… to save a dying child?” After the death of her parents, Countess Clarisse lost everything to her uncle’s family. To receive the only thing left behind — her parents’ inheritance — she must retrieve the family heirloom: a magical stone that was sold off. The one in possession of that stone is none other than Albert, the infamous “Brutal Duke” rumored to “even use children as tools of war”! —But now, that very “Brutal Duke” is raising a baby… with a rattle in hand instead of a sword! Unaware of this, Clarisse visits the Grand Duke’s estate to negotiate — and there, she encounters a dying child named Theodore. She soon discovers that she alone holds the power to save him. Recognizing her worth, the Duke proposes a deal: he will return the heirloom only if she agrees to become Theodore’s stepmother…?! And as someone who thought she never needed a family again, Clarisse finds herself becoming the center of their growing obsession…!