As the mixed-race son of a princess of a human empire who eloped with a marquis of a vampire principality, Mietta felt that she had been discriminated against for the first twelve years of her life. In the entire family, and even the country, his brother, as the Eternal Blood Eye with the purest bloodline, is the destined ruler in the future, while he is the most discriminatory human hybrid. For her cold and unapproachable brother, Mietta had always had nothing but awe and admiration, until his brother suddenly was willing to condescend and save him... The love that had deteriorated from family affection was destined not to be accepted by this mechanical and unhuman country. The mixed-race human beings with stained blood had to be expelled and returned to their mother country. Until one day, a long-planned holy war broke out between Ramonson and Istan. The long-lost brothers met on the battlefield. The vampire who launched a revenge war against the suzerain and the imperial prince who took over the power from his uncle fought again. However, few people know that there is a more ancient and evil danger that is threatening everyone. Pure-blood leader attack x half-blood seduced (?), Older brother, half-mother. The younger brother's personality has changed greatly. In the early stage, he was a doormat of his older brother, and later he became a powerful prince of the empire, scheming and strong.
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