The Somber Library
Chiyoko is asked to investigate a supposedly possessed library, which changes the contents of its books to be about trees. They discover the culprit to be one of Chiyoko's schoolmates who became possessed by a tree demon, which Chiyoko and Gyubid soon exorcise.
Aired 05/12/2012EP 25 - The Somber Library
Kuromajo-san ga Tooru!!
Kurotori Chiyoko, a 5th-grader in elementary school, loves the occult. One day, a friend requests her to do a love fortune-telling. Chiyoko tries to summon Cupid, but thanks to a stuffy nose, accidentally summons a witch named Gyubid instead!
From that day on, Chiyoko starts learning witchcraft from Gyubid, the self-proclaimed hottest instructor of the magic world. The training regimen is tough, and punishment for slacking is harsh. Fortunately, Chiyoko is able to keep her extra-curricular studies secret, aided by the fact that no one else can see Gyubid.
(Source: AnimeNfo.com)