Keraku no Ou

Both Nikuyoku Gangu Takuhainin (Living Sex Toy Delivery) and Keraku-No-OH (King of Pleasure) feature very similar storylines and plot structures. They're both revenge stories that revolve around the male protagonist capturing and raping various women that have wronged him. To do this, he enlists the help of an attractive female sidekick. So, if you enjoyed the plot of one of these OVAs, than you might enjoy the other. I will say that in my opinion, Living Sex Toy Delivery is significantly better in every aspect. However, that doesn't make King of Pleasure bad by any means. So if you liked one of these OVAs, you might want to consider checking the other one out! read more 

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!