is it a good anime? no. did i laugh anyway? yes. was it predictable? well.. i wouldn't necessarily say that.
i watched this knowing what i was getting into and had a good time only because it's hilariously bad.
anyway if you want a more coherent story, play the otome games! they flesh out the characters more and give important plot details that you need to know to understand the story and characters better.
also, yui is not as helpless in the otome games. ive watched people play them and they're definitely better written.
would not recommend to people who are here for an innocent vampire romance thing. it is far from innocent. it is supposed to be some sadomasochist stuff