I'm not sure how I felt about this series to be honest. I think if I had to describe it with one sentence it would be "it was ok" - I agree with the review that said Phase Moon didn't seem to know what story it wanted to tell because it was trying to be a mixture of a vampire story and a rom/com which on the surface isn't bad, but I don't think they executed it well enough.
I want to talk about Hazuki for a moment as she is the main part of the show. For the most part I found her to be fairly unlikable. I may be slightly biased in this opinion as Hazuki came across as a Tsundere character and I personally don't like Tsundere characters. The only one I do like is Asaka Taiga from Toradora. A lot of the times I found her to be loud and annoying. Lashing out when a lot of the time it wasn't necessary. She did have her moments in which she was sweet and actually a solid character, but then she would over shadow that by acting like her normal self again. It just got tiresome after a while. For the most part she came across as a brat which you could say is normal for a teenager. However, to say Kouhei did so much for her, she was way too ungrateful which really did not come across well.
The first episode and few after that was really good. I was really getting hooked on the story it was telling. A mysterious vampire girl trapped in a castle, trying to escape a demon keeping her hostage when she wants to escape to go find her mother and lead a normal life again, all whilst having an alternate persona. I thought it was really interesting and I was really looking forward to where the story was going. Then it turned into more of a comedy anime. The last 8ish episodes of the series also felt pretty forgettable too and I found myself not caring as much towards the end which is a shame as I felt like it had a strong start.
Overall, I didn't hate this anime but I wouldn't watch it again. I watched the OVA after just so I could say I've finished the series and even that was just ok at best. Slightly disappointed as I've wanted to watch this for a while and the last Vampire anime I watched was Seraph of the End which I loved.
6/10