Negima! Magister Negi Magi volume 4 collects volumes 10-12 in an omnibus format and features story and art by Ken Akamatsu.

Exhausted by Evangeline's training, battling enemy wizards, hiding his magic abilities, and teaching 31 students, Negi sleeps through the first day of the festival! All the girls he promised to spend the day with are going to be incredibly disappointed... or are they? This is Negima!, after all! But before the festival is over, Negi finds himself competing in the Budokai Marital Arts Tournament, and there's more at stake than he thinks!