Mejoku

Both got a school theme with a rather ok story. Mejoku is more based on revenge but the feeling is very similar.  

Keraku-No-OH and Mejoku both have similar plots. In each OVA series the main lead decides to get "revenge" on various women. And since these are both hentai, I'm sure you can figure out what that means. They do differ in tone, with Mejoku being fairly comedic, and Keraku-No-OH being more serious and dramatic. But they're both fairly campy, so it evens out. If you're a fan of older hentai, then you'll probably like both these series! 

Both was dubbed by same team but Mejoku is more of a final form of it.  

Both stories feature a male character getting revenge on several women after they humilliate him. Both men get a female accomplice, who they initially mistake as an antagonist. Female characters are varied regarding design, ans sex scenes are diverse.