Well, how do I start this off? By saying that this is my first review of a hentai anime? Maybe, but I've only written three reviews so far, so I guess that that would be obvious. I don't know the best way to start out this review, but I will say this: this review will be a little different than my last three.
At the time of this review, I've only written three other ones on Hetalia, Gun X Sword, and Popotan. In those, I judged the anime on its story, animation, sound, characters, and in the case of Hetalia, episode length. However, I'll have to switch gears just a teensy bit here.
Here's the thing about hentai anime, or rather, pornos in general. You can't review it like you would other things in the same media, whether it be books, anime, or movies. You can't judge a porn movie like Deep Throat the same way you'd judge The Cutting Edge, nor can you judge a hentai like Boin the same way you'd judge an anime like, say, Ghost in the Shell: Stand Alone Complex. Why? Because pornos aren't there to provide a good story, likable characters, or any of the sort. Granted, those can have a factor and can make the porno more enjoyable. However, they aren't there for that. Pornos are there for the purpose of sexual arousal, and hentai is no different.
When you watch a porno or hentai, you really shouldn't expect good story or characters, since chances are there isn't any. However, there are some exceptions, such as the hentai I'm reviewing right now, Boin, a 2-episode OVA made by Milky Animation Label and based on a PC game of the same name developed by Crossnet-Pie.
I'm going to be a little less strict about the characters and story this time. That being said, the story in Boin isn't really much of a story. Nothing happens other than that our main hero (we'll get to the characters) has sex with the other three characters. Not too interesting, but for a hentai, it's not that bad, and rather acceptable.
Animation is one of the more important parts of a hentai (not that it isn't important in anime in general, but story and characters are usually more important), and in Boin, the animation is actually pretty good. The characters all look nice and pleasing (no pun intended), and the girls actually have pubic hair, something that usually isn't shown in hentai or is shown very simply.
In terms of music, there really isn't much to talk about. Not too bad, but not great. As for voice acting... well, I usually watch anime english dubbed, so I usually judge the english voices. Now, there ARE english dubs for hentai anime, but Boin is one exception. From what I can tell, there's no english dub for Boin, and if there is one, I have yet to find it. I don't know much about good and bad acting in japanese, so I could be far off, but the voice acting isn't too bad.
As for characters, we have a rather... small cast of characters. Only four of them; one of them being a man, and the other three being girls. Our main hero is Daisuke, a teacher at (according to this entry) an all-female school. Our three sex-dolls are Nao (the red-head), Mitsugu (the blonde), and Touko (the blue-haired teacher). Since Boin is only a two-episode OVA, we aren't going to get any character development due to time constraints. The character that we get a bit of info on is Nao, and we only learn two things: 1) Her boobs are massive now, but she was flat when she was younger and 2) She made a promise to Daisuke. Since we get almost no development, what makes the characters likable depends on other factors, mainly appearance. In case of appearance, the characters look fairly decent. Daisuke looks alright. I believe he only wears one set of clothes (a yellow T-shirt, orange tie, and turquoise pants), and that's it. As for the other girls, they look, well... sexy. Obviously they're going to make the girl's tits look huge. Ignoring that, the other three characters look nice. They at least wear more than one set of clothes. Nao, for example, wears a nurse outfit, a school uniform, and then an apron with nothing underneath. Overall, the characters don't get much to make them likable, but for what it's worth, they're okay, and visually speaking, they look good.
Now, Boin is hentai anime. There's usually only one reason why you'd watch a hentai, and that's the sex. So, what say we focus on sex for a moment? First is the number of sex scenes. Boin may only last two episodes, but that's no excuse for not having many sex scenes, which hentai is mostly made of. There are a total of five sex scenes, which isn't two bad for two episodes. I myself am not an expert on sex (I'm a 15-year-old virgin), so my knowledge on sex positions is limited, but the characters took many different positions. At one point, our main stud Daisuke has one of the girls masturbate in front of him and holding in her orgasm. At another point, Daisuke and Mitsugu are in the cowgirl position, and Nao, who already had her turn, comes up and starts sucking on Mitsugu's nipple, causing further stimulation. Nao then kisses her and remarks that Mitsugu's face at the moment makes her look cute.
... what? Hey, I can't really say much about the sex scenes, other than that they're... well... sexy, I guess. They certainly give me a hard-on, and for hentai, that means a job-well-done. I guess I better wrap up this review before I get caught by my parents (seriously, I get no fucking privacy anymore). Overall, Boin is pretty decent for a hentai. The characters look visually appealing, and most importantly, the sex scenes are 'sexy' enough to do what any hentai should do: arouse you.
