A demon which Taito enters a contract with in order to get more power to protect Himea. In exchange for magical power, Taito gives 3 litres of his blood every day. 

Taito has been really sleepy lately, and keeps dreaming of a female vampire who says she has given him her "poison." Sometimes he even thinks he hears her voice when he's awake. But after surviving an accident that should have killed him, Taito's world changes drastically and he realizes that his dreams are more real than he thought.

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Taito has been really sleepy lately, and keeps dreaming of a particular vampire who says she has given him her "poison". Sometimes he even thinks he hallucinates her voice when he's awake. But after surviving an accident that should have killed him, Taito's world changes drastically and he realizes that his dreams are more real than he thought.

A freshman of Miyasaka High, Kurogane Taito was average at everything. And all this while, he had believed himself to be an ordinary regular guy. But, he was wrong. The reason was because of a certain event 9 years ago. For the sake of a promise he had made then, he had already stopped being ordinary a long time ago. However, not a single fragment of his memory about that promise remained. Who had stolen his memory and to what ends? One day, as a consequence of a certain event that had descended upon his ordinary life, his memories were restored. That marked the beginning of his &ldquo;extraordinary&rdquo; life... 
--- you&rsquo;ve finally died. I&rsquo;ve been long waiting for this day --- 
I&rsquo;ve always thought that I&rsquo;m a supporting character in life. 
But once again, it starts from here. 
My story. 
I&rsquo;ll &ldquo;die 7 times&rdquo; for your sake 
Everything starts from that promise. A story of a reverse school fantasy! 
(Source: Baka-Tsuki)

Vishoub Eleranka