Demons are escaping from the underworld, and causing much havoc on the population. Possessing both human bodies and artifacts alike, the demons are inconspicuously forcing people to commit murders; the demons must be stopped! The task of returning – or exterminating – the offenders lies with Enma, Kapaeru, and the talking witch hat Shapoji; can Enma and the gang banish the demons before things get out of hand?
In the year 1986, eighteen members of the Ushiromiya family head to Rokken Island where Kinzo, the elderly head of the household, will soon choose one of them as his successor. A portrait of the Golden Witch Beatrice greets them as they arrive at the family mansion, along with a disturbing epitaph: she will be resurrected on the ninth twilight after a number of bloody sacrifices. Unfortunately for the group, the statements come true, and soon the carnage begins. Will anybody walk away from the ominous island, or are their destinies due to be forever ruled by Beatrice?
Dark and twisted, there is much in both Umineko and Enma to keep fans of horror watching. The story does not take the viewer by the hand and lead them along by explaining every nuance, but instead relies on the viewer concentrating and figuring things out for themself.
If you liked one, I think you should at least try the other.
In the human world, there live demonic invaders named Shinma who prey upon the fragile souls of humans. The only hope for the humans is one of demonkind: Miyu, who is fated to destroy the Shinma and send them back to whence they came. Although half-human herself, as well as living amongst them as a typical high school student, she bears no compassion for those she saves, as well as condemns. Along with Larva, her subservient, Miyu sets out to destroy evil, one Shinma at a time.
I'll keep it short : those two shows have a similarly dark plot. If you like very dark and twisted (somewhat depressing) stories , those anime should suit your taste.
P.S. I could add that Enma uses fire as his weapon, just like Miyu, but honestly it doesn't matter (or at least it wasn't the reason for making this recommendation).
STN is a secret organization charged with capturing witches of all ages who misuse their inate ability of the Craft. Its newest recruit is a young girl named Robin, who wields the same power that she is helping to control. While skillful at their ability to detain quickly, the number of witches keeps seeming to increase, and the misuse of power grows stronger, casting a shadow of doubt as to what is really going on. For STN, there is much work ahead, and for Robin, her troubles are just beginning...
Watanuki faces challenges in every area. Spirits chase him, his best friend Doumeki isn't really a friend, and his boss Yuuko seems to have mistaken him for a servant come housewife. When Yuuko requests that both of them join her in accepting a special invitation to a collector's house, he can just hear the trouble coming. Upon arrival, the house proves to be more than a bit unusual, and the other guests are almost scary with their fanatical collecting. But, the worst thing about the situation is the knowledge that for all the weirdness Watanuki can see, it is absolutely certain that the mysteries are way more complicated that he thinks. Depending on Yuuko's arcane knowledge may be the only hope.
XXXHOLiC movie and episodes 3 and 4 from Demon Princ Enma seam to have a very similar story, and it reminded me of the book "Ten Little Niggers" by Aghata Christie (a very good criminal thriller). Surly DPE is much darker then HOLLiC, but the resemblance is obvious. You should definitely check the other one if you liked this one.
P.S. Both of those shows (HOLLiC Movie and the last two episodes of DPE that is) suffer from overuse of (medium quality) CGI. But you should be able to bear with it (unless you like stuff like that).