Inbaku Gakuen

-both hentai -have schoolgirls that are sex slaves -both have principal/ vice principal in the "action" 

Both are hentai that had m/c with a cheating mother. Both m/c believe women are all nymphos (women who are addicted to sex with whomever and whenever). 

It is every parent's dream to see their children excel in school with a better future in mind. However, an uncontrollable desire lurks within a few that would love nothing more than to dominate a teacher. Having a teacher as a slave will certainly be a ride to remember.