Mahou Sensei Negima is a stroy about an 10 year old mage named Negi Springfield from wales who wants to become a Magister Magi (Latin for Master Mage) And find find his father, a legendary mage named the Thousand Master who has been missing for many years and has saved Negi as a child when Negi's village was attacked by demons.
At ten years old, Negi graduated from his Magic School and was up the top of his class but with his graduation certificate read that to become a Magister Magi, Negi must take an assignment as a English Teacher to teach English at Mahora Academy as a part of his training to become a Magister Magi, Negi gets assigned to class 2/3A where there is 31 different students all unique from each other that Negi must teach as well as go on many addventures and dangers along the way to become an Magister Magi and find his father.
The manga starts off like a normal harem manga ( panty shots, boobs) but becomes more as an shonen manga with different genres thrown in that makes Negima unique compared to other shonen based manga the more the story unfolds with each chapter.
There is also negima!? Neo which is a spin-off and not apart of the original canon that's in the same setting but has a different story and more focused on the harem elements rather then the original Mahou Sensei Negima!, As well as a anime of negima.that's also an spin-off.
Standing in the Arena
As a verse, Negima is easily above the HST as well as the power six and above yu yu hakusho and around Samurai Deeper Kyo level due to negima's massive speed advantage from mid, high and top tiers with them having around triple digits to even quadruple digit mach speed and their hax such as the Shinmeiryuu swordsmanship style for exorcising demons that can attack the soul directly and can ignore durability, Ki and magic Techniques, absolute zero, phase transition, time/space magic and technology, petrification, elemental dispersion like negi's lightning intangibility (as well as the non-corporeal lifemaker) dimensional creation (now with a dimensional travel device ) time travel and pseudo time stop gear,Code of the Lifemaker, powerful summons that can go into the hundreds of thousands, Magic Cancel (both for ki and magic) As well as a few mountain busters and that's just the tip of the iceberg.