Mutsumi Kagidou finds herself being blackmailed by a perverted student, Inuhiko. The blackmail material? An embarrassing photo of her. In order to get the photo back, she becomes Inuhiko's sex slave and they have all kinds of debauched sex. After a while though, Mustumi tells Inuhiko to forget about the photo since she doesn't mind being his sex slave anymore. And so, a 'unique' relationship is formed between the two of them.
Although I'm not a type to like slave, bondage, SM, etc... I like happy endings with harem :). If you like to watch and be surprised, don't read my reviews, as I have spoilers and often talk about what happens in them. Besides the point, of this hentai having genres of what I said up there, the characters have a more subtle personality. They don't forcefully rape the girls. Although they can be a bit conniving at first, the girls end up liking that they are slaves. As in the end, the shota boy said, "Happiness is perfect with just 1 slave." Then the girl ending saying "I'm soo happy!" Then the 2 young ladies are arguing who gets to have sex with the blonde guy first, then he ends up saying, "since you're both slaves, why don't you guys just get along." I wish they used the word of more positive demeanor than slave (dorei).
Although I accepted to watch this, as the females accepted the fact they were slaves and that the male protags were comically indifferent about sex. Like them saying, "Oh, if you don't want to do it, we'll just stop right here." Although he indirectly knew, the girls wanted to do it anyways and was teasing them. He gave them free will to do or not to do.
Overall, I wouldn't particularly watch it again. But I wouldn't mind watching it. If you like the overall sex driven slaves, bondage, SM, etc... this still might not be for you as its softcore to the genres above. Although if you do not like those genres, this hentai might be safe enough to watch and still enjoy it :).