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According to the official website, an OVA of Nekogami Yaoyorozu was announced to be released on March 21st 2012.

Before the beginning of the series, three OVAs were produced for the sole purpose of introducing the characters. The first two were released on DVD bundled with two drama CDs, with the third being sold separately. It is unknown if these will ever be released outside of Japan. The first OVA is a re-enactment of the first chapter, where Negi first learns of his job as a teacher and is introduced to the students of Mahora Academy 2-A. It ends with profiles of the Baka Rangers (Asuna, Makie, Yue, Ku Fei and Kaede) as well as Ayaka. Asuna is the only girl in the class that doesn't have romantic feelings for Negi. The second OVA is a re-enactment of the "love potion" incident of chapter 2, with profiles at the end of Nodoka, Konoka, the cheerleaders (Misa, Madoka, Sakurako) as well as Kazumi. The third OVA is a re-enactment of chapter 13: Negi's Mahora tour with the Narutaki twins. The tour shows Negi to several of the students (Yuna, Akira, Chao, Satsuki, Satomi, Chizuru, Natsumi, Zazie) as well as others that he ends up missing (Sayo, Evangeline, Chachamaru, Chisame, Misora, Ako). After being chewed out by Haruna for completely skipping her, a final scene introduces Setsuna and Mana, keeping watch from something on campus. (Source: Wikipedia)

A remake of the Negima anime with its own original story. Wizard Negi Springfield may be a boy, but he has a man-sized job to do! Fresh from the Academy of Magic, Negi continues his training as an instructor at Mahora Academy in Japan. But before he can get his Masters in magic, the 31 schoolgirls of Class 3-A are gonna keep him up all night cramming for a final exam in will power. Temptation aside, Negi has more on his syllabus than flirting and spells. Darkness is closing in, and Negi is gonna need help from his lovely student bodies to drive the ghouls from their school. These girls want to prove that they're the best in class, and extra credit is available to the cuties that aren't afraid of after-hours phantom fighting! (Source: DVD case)

Ryousuke Hazuki is a young man whose heart has been stolen away, stopping by the local floral shop daily in order to catch a glimpse of the beautiful Rokka Shimao, the shop's owner. In hopes of getting close to her, he decides to get a part-time job at the shop, but before he is able to make his move, he runs into a major roadblock: in her apartment dwells a ghost who claims to be Rokka's deceased husband. Atsushi Shimao has quietly watched over his widowed wife ever since he passed three years ago. However, Hazuki is the first person to ever notice him, and the two quickly find themselves at odds: the jealous Shimao attempts to thwart the suitor's advances and possess his body, while Hazuki simply wants the ghost to pass on for good, allowing Rokka to move on from the past and him to be with the one he loves. As both men refuse to let go of their desires, an unusual relationship forms between a troubled woman, an unrelenting ghost, and a stubborn man in love. [Written by MAL Rewrite]