Intro. From the shadows, someone was watching over them. Carla and Shin Tsukinami grew up unknowingly, because after the death of their parents, their guardian Selene Seymour had sworn to protect them. She, the aunt of the Seymour family, preferred to observe them from a distance, appearing only when danger threatened their lives. He then took them to the Seymour house, where they lived with hybrids and other branches of the family, far from the war that exterminated entire races. A year passed. On her nineteenth birthday, Carla heard from Selene a forgotten truth: her mother had arranged an engagement in her childhood. However, it would not be forced. "At least know her for two years," he said. That young woman was Elsa Tepes, with pink hair and green eyes, a succubus who also possessed inherited magic. Carla barely remembered her, like a childhood friend. Now, outgoing and surrounded by her friends Sasha, Irina, Yusurija, Victoria, Yui, as well as Jack, Ivan and Ilay, she was in front of him again.