ANOTHER IDEA!

Naruto-Highschool of the Dead crossover, Hiruzen Sarutobi main character!

-Conditions: Sarutobi wakes up in Japan long before the outbreak (I'm thinking a year or two) and ends up as a teacher at Takashi's school (His title is 'The Professor' after all)

-Hiruzen manages to save a full classroom by freezing them with killing intent

-(Not necessary, but preferred)He knows Seiko, Rei, Hisashi, Saya, and/or Kohta through either observing the various combat-oriented clubs (first three) Being their teacher (Saya and maybe Kohta) or simply conversing with them (Kohta)

-(Preferred, not necessary) He makes the school his headquarters, I always thought it was stupid they didn't carefully pick off the zombies inside, since the gate was still locked at that point

If anyone tries this, please let me know so i can read it!