Now, in 2016 I honestly have to say that the hentai genre have been totally destroyed in the last few years. Unfortunately, most of the newer OVAs are unenjoyable garbages. Despite the (sometimes) good animation and graphics, almost all of them are absolutely lacking any good writing - something the makers cared about back in the old days... at least a little bit more often. Nowadays various shitty VN adaptations dominate the market, that often contain extreme fetishes (like scat), or otherwise you can watch those boring as hell vanilla manga adaptations. In this devastating situation Sexfriend was like a ray of hope for me.
Sexfriend has a quite basic story: a girl tells a guy to become sexfriends, the guy has sex with some other girls too, but the girl doesn't mind it. Nothing more, the end. There aren't unneeded side plots, forced rape scenes, "unused" side characters, or strange and extreme fetishes wich just don't fit in. It's simplicity, which made the story almost realistic, was refreshing for me, and most importantly it was not boring at all.
The characters were pretty average, but worked well together. I think Hayase was the best and she's a really good hentai character all together. Especially because she didn't fall for Takabe at the end, which surprised me! Compered to other hentai she's a rather competent female character. Takabe and the side girls were ok as well, I was relieved that they didn't force some stupid love triangles into the story.
The main negative aspect of Sexfriend is that, compared to newer hentai, the art is a bit old style and not so beautiful, after all. But, in my case, I didn't care about it at all after just 5 minutes. You have to get used to it, I think.
After all, this is an enjoyable hentai, if the art doesn't bother you. The sex scenes are hot, the characters aren't irritating, so if you like better-than-average written vanilla style hentai, I can totally recommend watching it.
