Once upon a time, the King of Hell was hurt and took refuge on Earth. While he was there, a {{bifauxnen}} young lady named Chiaki took pity on him and tried to help him out. Our King Ororon promised to grant Chiaki one wish. She asked him to stay by her side forever. Being a man of his word and a man in love, Ororon did as she asked of him and then all Hell broke loose. Literally.

!!This manga provides examples of:

* BadassNormal: Considering this universe is full of powerful angels and demons, Lika would count as a human girl who still kicks serious ass.
* BeautyMark: Ororon has three underneath his left eye. Othello has one.
* BetaCouple: Lika and Shiro are ''very'' bitchy towards each other, in contrast to Chiaki and Ororon's forbidden yet oddly quiet love.
* BewareTheNiceOnes: Push the usually calm and collected Ororon to the brink, and you're in for a world of hurt.
* BloodierAndGorier: As the series progresses (as in by the second volume), the amount of blood n' guts shown goes up as well.
* [[CatGirl Cat Boy]]: Shiro and his ''friggen' adorable'' little brother Kuro. They show up initially to eat Chiaki, but end up living with her.
* {{Chiaroscuro}}
* ConvenientlyAnOrphan: Chiaki, and this may have something to do with the fact that her [[spoiler: father, who was an archangel, married her mother, who was a human. It is forbidden for these two species to wed, and the punishment is execution.]]
* DownerEnding: Oh, man.
* DysfunctionJunction: Let's see...there's {{Satan}} himself [[spoiler: (well, more like the current King of Hell)]], his [[NeverMessWithGranny elderly maid who could kick your ass across the room,]] and two [[CatGirl demon cat boys]] living in the house of a half angel who [[spoiler: can involuntarily unleash godlike powers beyond her control]]. Oh yeah, sounds [[SarcasmMode like a perfectly normal "family."]]
* GoodSmokingEvilSmoking: Many demons smoke. A few of them do not (namely, Othello, who is never shown smoking at all, though he replaces it with sex). Absolutely no demon chain-smokes to the extent that their king does. Ororon began smoking at age 15, is now 123, and is rarely shown without a cigarette in his mouth.
* ISeeDeadPeople: Both Chiaki and Ororon have this ability.
* InterspeciesRomance: Two. One between a half-angel and the King of Hell, a demon. The other is between a human and a demon cat boy.
* JiveTurkey: Some characters drop select "street-jive" words like "dig" every so often. One isolated instance results in a [[FunnyMoments crowning moment of funny]] when huge, stone like monsters are summoned by Ororon to kill everyone. The monsters initially speak in YeOldeButcheredeEnglishe when addressing the King of Hell, but when they argue over who will do the most killing, one shouts "Both y'all a bunch of slap-monkeys. I OWN this shit!!"
* ManOfWealthAndTaste: Ororon and Othello both have the habit of wearing suits. While Othello wears white and is taller, he is often mistaken for Ororon as they both have light hair and moles under their eyes.
* MayflyDecemberRomance: She's 15, he's 123.
* MeaningfulName: It's not apparent that eccentric playboy Prince Othello has any connection to Shakespeare's Othello, until we learn that [[spoiler:he was manipulated into killing his wife]].
* NoodlePeople
* SensibleHeroesSkimpyVillains: Demons, who are portrayed as honest if nonchalant about their various sins, tend to wear suits and long skirts. The majority of angels are arrogant about their supposed virtue, and often wear skimpy white dresses (they even had a crossdresser who wore lolita). Chiaki, as a half-angel, often shows some leg in shorts or miniskirts.
* SliceOfLife: Slice of a half-angel's [[InnocentCohabitation Not Entirely Innocent Cohabitation]] with the Devil. And his housemaid. And a couple of other demons. And her best friend.
* StarCrossedLovers: You know something's messed up when God Himself disapproves.
* ThemeNaming: The princes of Hell (as well as the former and current king) all have names that begin with O.
* TroublingUnchildlikeBehavior: Expected for the Princes of Hell.
** Ororon was a fairly sweet, quiet child who wanted his mother's love, but never got it as she was insane and resented him for looking like his father (who raped her and killed her lover), becoming the incredibly ruthless murderer that he is today.
** Othello was a well-established playboy before he reached puberty, and while it was tempered by him being devoted to his wife and child, he lost all boundaries and grew distant with his son after [[spoiler:being forced to kill his wife or be killed himself]].