It's a good anime but sometimes I find it very confusing at times and yui can be very dumb as she could just run away but she doesn't and the way the guys always like feed on her every episode so like I dont get their relationships with her like do they like her or do they just find her as food. I love ayato and the way he says yui belongs to him confuses me alot as does he only mean it as he's his food or something? But I find it interesting. It's just the way they treat her as a toy and they don't see that she could maybe die or something from them all drinking her blood and then she's just too dumb enough to run even when she had the chance.