This is mostly the same mahou sensei negima plotline with small differences in the events mostly because he is duh 15 instead of ten making it somewhat harder to resist teasing from his students

Negi and his students are off to face Fate and his army, but even with the might of the magic world at his back it was still uncertain who will win. To secure their victory, the crew sets off to find Nagi, Negi's father. But will it be enough? Negi harem!