Zessei no Akujo wa Maouji-sama ni Chouaisareru

The False Bad Girl is Doted on by the Strongest Demon Tribe...
Suzuran, feared as "the most evil girl in the world," is actually a kind-hearted girl. She spends her days being tormented by her real mother and twin sister, Seiran. Then, at St. Riches Academy, where both humans and demons attend, Bran, the head of the class, falls in love with Suzuran at first sight and proposes to her! She also meets Yomei, the Noir class leader, who is renowned as the most powerful demon...?