Ookami Kakushi - Keshi Murasaki no Shou

Hiro has moved with his father and lame sister Mana in new city and at once he was hugged by a girl, who introduced herself as Tsumuhana Isuzu. She said she fall in love with him at first sight. But it seems, Isuzu is not ordinary human girl... It starts to happen something strange. Kushinada Nemuru, a mysterious classmate is probably hiding something.
Kuzumi Hiroshi moves with his crippled sister and his father to the remote city of Jouga, which is famous for its hassaku citrus and the rumors that a species of enormous wolves once lived in the area. While some of the residents are more than friendly, when people begin to vanish suddenly, it becomes apparent that something sinister is afoot...