Monku no Tsukeyou ga Nai Rabukome

Kanaruzawa Sekai, a silver-haired, red-eyed girl known as “The God Who Lived A Thousand Years,” receives high school student Kirishima Yuuki as a living sacrifice. Pompous and unfamiliar with the world around her, Sekai spends her days reading in her mansion, though her childish appearance belies her tolerance for alcohol and tobacco. Told she will grant him one wish in exchange for his sacrifice, Yuuki asks Sekai to marry him. They begin living together, but their days are neither peaceful nor loving. Soon, a terrifying secret concerning the entire world begins to throw everything into disorder, as their comedically pure love story unfolds.