ATTENTION! SPOILERS AHEAD!
The problem with this anime? Its wasted potential. I remember watching the first episode of the main season and being seriously disturbed by the characters' behaviour. Nevertheless, after dwelling into their story, I understood their ulterior reasons. This does not mean that I endorsed their actions, just that I could understand the reasons behind this behaviour.So if you get the feeling that the anime is garbage at least try to take a glimpse at the story behind. It's worthy!
Story
So by now you may have understood that what really annoys me about DiaLovers it's the lack of plot and character development. Ok, they are sadist and their main hobby is to stick their fangs into their Mary Sue puppet. And if it would be all about this, I would have given up after the first episode and rate it 1. The thing is, there is a story but the creators have issues in displaying it properly. There are bits and hints, but if you are not interested, you won't find much. Nevertheless, in the OVA, there is so little plot as usual: alongside with the 5 Sakamaki vampires, 4 others appear, all of them expressing their concern about not finding their puppet so we spend half of the time searching for her and the other half seeing her being treated like... yeah.
Animation
Ok, the animation it's beautiful. Some may not like it, some may insist on its flaws, but I consider the animation just stunning. Let's face it, DiaLovers has a lot of fan service and it delivers the right kind of animation for this. The Bishounens are so beautiful it hurts. And if you are not into sadism, at least you can enjoy the beauty of the blood drops running along the skin or staining the water. Or there is beautiful scenery. So yes, I think that the animation is one of the main qualities of DiaLovers.
Sound
Ok, so there is the same creepy, flat, stupid music. However, the voice acting is flawless. I am always in awe hearing them speak, as the voice actors are capable to convey complex and captivating emotions, glimpsing into the potential of the characters.
Characters
Once again, love to hate them, hate to love them. I love that there is a bit of development in Kanato. I always felt like he was the most dull and disgusting character but maybe there is more to him than this. And I love Azusa and Ruki.Quite captivating.Azusa seems so graciously disturbed he stirs my curiosity big time.
I am sure the anime won't make me know him but, hey, I've got a full page of wiki to read! One thing I don't like, as it was the case in the main anime, is Ayato's behaviour , as he thinks that his biting and his jerky behaviour pleasures Yui SO much. Basically, he hits her, refers to her as his prey or his material posession and he truly thinks this is what she wants: "your face is asking for it" , "Then if you desire it so much, I'll let you feel my fangs" I hate the vibe i get from this, his vocabulary seems to be one of a rapist and her lack of reaction drives me crazy . (in the games, apparently, she does enjoy his biting but she seems so pained in the anime -_- )
Overall
So the thing is, you can't *enjoy* this anime as there is not much about the story. You root for the boys if you know their backgrounds but, mainly, you fangirl over the beauty of those bishounens and indulge in their weird, out of place behaviour. I knew this anime was messing with my mind from back then, when I defended Laito for his (apparently) unforgivable behaviour (take me to church much ^_^) . And still, he,along with Subaru, is my favourite character. Ruki and Azusa also seem nice additions, so I guess I will wait for more bishounening in the 2nd season.
Conclusion
Oh, DiaLovers, you can do so much better, you can be so much more! Really, there is such a rich background so they could create a compelling and intricate story to make you fall for the characters and suffer along with them and... But no, DiaLovers is all about Do-S or Do-M and seeing this OVA, I don't think there is any chance for the next season to go elsewhere. It could have been a wholheartedly 5. In exchange, I settle at 3,5 because of the beautiful animation, beautiful boys and great voice acting. I think the score it has in here is a tad too cruel. DiaLovers certainly has its strong points, this if you are able to overlook its enormous flaws.