It is pretty good, im not very much into hentai, im not very interested in sex, but it was really awesome, very unusual and interesting plot. Main heroine kinda silly with her walking alone in her underwear at night to check out the strange noises she heard, but it hasn`t ruined the impression, i very like her villainous sister - she is cruel, but not worse than other characters, she is adorable and has sad story, she really has warm attachment to main heroine, i felt sorry when main heroine was adviced to kill that girl. There are some usual sex scene between one ofvillains with her husband, but it wasnt very impressive - as for me - there are also was some rape, bondage scene towards poor maid-girls, and gorgeous yuri scene with Hotaruku - i love Hotaruku, she is adorable, also idea with flowers grew on the blood of sacrificed people is very alluring, in my opinion. I like everything, i put the highest score ito all categories. Story is great, especially for hentai, it can be perceiving as normal supernatural anime aside from having sex scenes, which were actually neccesary both for dark atmosphere and for the plot too, as for characters - the best character in my opinion is Hotaruku - she is cute, strong-willed girl. Other characters are kinda lame, maids are poor unfortunate people, causing only pity, second female villain is not completely evil, as well as her father and husband but still she was bad person as well as her father and jerk of husband. Sister of Hotaruku is not that bad, she is just average girl, nothing very special aside from her being innocent andkind-hearted, which made her outstanding among other habitant of Hotaruko`s mansion