Negima!? Neo Volume 6 was released in Japan on April 17, 2009 by Kodansha for ¥400. This is the sixth volume of a series of seven books in total about the challenges of Negi, a child wizard who is tasked with teaching a class of junior-high girls all while searching for clues to lead to his missing father.
This series was written by Takuya Fujima and is a spin-off of the original manga and is essentially, a retelling. It was released under the supervision of Studio SHAFT for their Negima!? anime series.
お師匠・エヴァンジェリンに、父親・ナギのことを尋ねたネギ。それを聞いたエヴァは、魔法を使って自分の記憶の世界に、ネギを入り込ませる。そこでは、ナギとエヴァの出会いや、旅先の村で起こったことなど、ネギの知らなかった父親の姿が次々と見えてきた!!
-- Kodansha