【Book, Manga, and Anime Adaptation】 Decided to be adapted into a TV anime in Spring 2025! The novel is published by KADOKAWA K LNovel Books f, with 3 volumes currently available. The manga is serialized in Palcy, pixiv Comic, and Magapoke, with the latest 8th volume on sale. Three years after her debut in society, Lady Melfiera, a countess, has been plagued by false rumors due to a certain hobby, making it difficult for her to find a suitable fiancé. Her stepmother, who does not approve of her, tells her that she must find a fiancé within a year or be sent to a convent. In a panic, Melfiera attends the autumn ball. Unwilling to participate, she stands alone at the ball, only to be suddenly attacked by a mad beast infected with magic poison. Just as she is in a life-threatening situation, a bloodstained man with a sly smile saves her. This man turns out to be Duke Galbraith, known as the 'Bloodthirsty Duke'. Duke Galbraith becomes interested in Melfiera, who is not only unafraid of his bloodstained appearance but also of monsters. Moreover, she not only understands his secret hobby—enjoying monsters and mutated plants—but even offers to satisfy her insatiable curiosity...!? Suddenly engaged! Marriage? Could I be being tricked!? A love fantasy about a gluttonous lady who seeks ways to enjoy monsters for the sake of her people and a bloodthirsty duke who continues to exterminate the monsters that appear in his territory, as they navigate through malicious rumors and find true happiness.