"I've finally found you. I've been searching for you, since I was born." Melting eyes, sweet words, and a ruthless elimination of anyone who gets in the way. This love... is intense! Euphilia, the daughter of a count in the Mistilteinn Kingdom, grew up without knowing the love of her family, as her younger sisters were given preferential treatment. Determined to live independently, she studied alchemy on her own, but eventually grew tired of expecting things. One night, a search for a mate for Emperor YoRHa, the ruler of the twelve beastmen tribes, a guest from the neighboring country of Zingrow, was taking place. Unaware of this, Euphilia was resting alone in her room, tending to a wounded little owl. The next day, the owl beastman, Emperor YoRHa, began to propose to her passionately...!? The oppressed girl becomes the beloved emperor of the twelve beastmen tribes. Fujimori Fukurou's latest work is the ultimate Cinderella story of marriage! *The digital version comes with a bonus short story and a crossover short story between "The Owl and the Master" and "The Hiki-NEET," "The Whims of the Great Tree."