Personally I think the show would be way better if the episodes didn't last only 15 minutes, if the plot was explained more, and if Yui and the boys underwent some kind of character development. And something that annoys me so much is that it's suppose to be romance but from what I see there is zero romance between any one of the charcaters, it's literally the boys fighting over who is going to drink Yui's blood and they treat her like an object and she lets herself get treated like that too.