I Become Beautiful by Sacrificing My Sweetheart

Natsuki Morimori is an ugly girl. Half of her face was burned off because she saved her childhood sweetheart Gou Juanji. In order to restore her appearance, Natsuki, who has low self-esteem, associates with the cursed spirit and transforms into a cruel devil in the dark night. Until—— When she was about to fall into the abyss. The white-haired boy stuck out his snake-printed tongue, and a lot of blood flowed from his mouth. He grabbed her hand and said in a hoarse voice over and over: "Yueyue is the most beautiful girl in the world. Yueyue will definitely be happy." ——— Warring States Period. The most beautiful princess of the Kanna family turns into a heart-eating monster at night. In order to protect the most beautiful skin in the world, the princess bewitched the dog general of the Western Kingdom and made him willingly give up his heart. In the blood, the princess holding the heart in her hand is like a wild flower, blooming in the heart of the head of the Gojo clan, the demon slayer, taking root in it, trying to drain his blood. From now on. The Gojo family has an unspeakable "taboo", and for this "taboo", the head of the Gojo family has become the most terrifying "curse spirit". ——— (Abo's private design, Natsuki is the only omega.) The elements are to be determined, add whatever comes to mind. Purpose: Pursue the purity of spiritual unity