The vampire aspect is pretty lighthearted. The vampires have fangs, immortality, and they suck blood, but otherwise they're pretty normal. Yuu being a vampire is played mostly for comedy between her and the guy who turned her and so that we can have semi erotic scenes with Yuu sucking girls' blood.
To be honest the rushed end didn't bother me. Since I was most interested in the relationship between Yuu and Nana, I felt satisfied in the end. It's a shame the author had to condense everything, but it wasn't nearly as sudden of an end as some yuri I've read (looking at you, Lala).
The art might not be to everyone's taste but I ended up liking it. Overall, this was a fun read.
