Still reading the manga. I want to defend this, but I can't. Looking at it properly it's no different from any other fanservice harem manga/anime. Has pretty much all the conventions, it's just a different setting.
Only thing I can say for it is that it has hot girls. Ice Bitch in particular, but vampire and succubus are hot too. Loli is mostly annoying. Other witch is pretty hot. Loli vampire is fairly hot.
Main character is a copy pasta male harem lead. Only his stick is he's got vampire blood in him now and has to be careful not to go crazy and kill everyone. Half the issues end up having to pull the same crap to have male lead enable female lead to save everyone.