At the behest of her father, Yui Komori goes to live in a secluded mansion, home to the six Sakamaki brothers—Shuu, Reiji, Ayato, Kanato, Laito, and Subaru—a family of vampires. As her days turn into endless nights, and each brother vows to make her his own, Yui falls deeper and deeper into madness and ecstasy.
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Eldest son of the Sakamaki household, son of Beatrice and Karlheinz. Lazy and apathetic and loves nothing but music.
Second son of the Sakamaki household, son of Beatrice and Karlheinz. Reiji is strict and sadistic, and takes care of the household in the place of his lazy elder brother.
Third son and child of Cordelia and Karlheinz, eldest of the triplets with Kanato and Laito. A mischevious and narcissitic person who tries to be the best in everything.
The fourth son and child of Cordelia and Karlheinz, he is also the middle child of the triplets of himself, Ayato and Laito. He is mentally unstable and child-like.
Fifth child of the household, son of Cordelia and Karlheinz. He is perverted and sadistic and is rude to most around him.
The sixth and youngest child of the household, he is the son of the third bride of Karlheinz, Christa. He is violent and sadistic, and does not get along with any of his brothers.
A normal girl who is sent by her father to the Sakamaki household. She is good-natured and sweet and remains strong despite the situation she is in.
"Mr.SADISTIC NIGHT" by Midorikawa Hikaru and Toriumi Kousuke
"nightmare" by Hayashi Yuuki
Suegara Rie as Komori Yui; Toriumi Kousuke as Sakamaki Shuu; Konish Katsuyuki as Sakamaki Reiji; Midorikawa Hikar as Sakamaki Ayato; Kaji Yuuki as Sakamaki Kanato; Hirakawa Daisuke as Sakamaki Laito; Kondou Takashi as Sakamaki Subaru