Kazuna Takashiro

Chizuna's younger brother. Recently afflicted by a "vampiric" condition that is passed down through the Takashiro family. He has his mother's last name. ~!At the first of the manga series, he admits to himself he's in love with Yaegashi, but later pushes her away after he has a dream in which he killed her for her blood. As Kazuna showly cuts ties with Yaegashi, he begins to fall in love with his sister. The two even kiss (once in the anime, twice in the manga). For his disease Chizuna gives him two bottles, one of…