This was kinda disappointing to watch.
I'm not exaggerating when I say that the quick paragraph summary at the top of this page has quite a bit more story in it than the entire 28 minute video.
So yeah, it's essentially just non-stop sex. I guess that should satisfy some people out there, but I was hoping that this would be interesting to watch in addition to hot.
Story = 1/10
The art is pretty decent, it's better than a lot of older hentai but it's still not the best.
Art = 7/10
I don't have anything bad to say about the sound, it did what it was supposed to do
and nothing more. It's rare for a hentai to really stand out in the sound department anyway.
Sound = 6/10
The characters were pretty attractive, but they get almost no development. I managed to understand that most of the female characters were sisters of the guy, but because nearly everything they said was about sex, it was hard to learn much about them.
Character = 2/10
If all you're looking for is sex than this is pretty good, there sure is a lot of it.
But this could have had an interesting story or decent characters with that sex, but nope.
There is a kinda long Visual Novel version of Oyako Rankan. From what I understand the story of that is supposed to be pretty good.
It's unfortunate that so little of that story made it into this OVA, but anyway, I'm sure plenty of people could still enjoy this.
Overall = A little below average