->For the 1987 horror movie of this name, see ''Film/AngelHeart''.

''Angel Heart'' is an ongoing {{seinen}} {{manga}} series that was published in ''Weekly Comic Bunch'' from 2001 throughout 2010 and is currently published by Comic Zenon. It was adapted into a 50-episode {{anime}} series during 2005 through 2006. The series is an alternate history of ''Manga/CityHunter'', in which Kaori dies in a car accident and her heart is transplanted into the heroine of this series, a professional assassin who killed herself. Brought back to life with Kaori's heart, "Glass Heart" soon discovers she has Kaori's memories as well. She escapes the organization that trained her and goes in search of Kaori's life, including ChivalrousPervert Ryo Saeba (the hero of ''City Hunter'').

After the inevitable problems are resolved, Ryo Saeba becomes the former assassin's informal adoptive father (she's only fifteen at the story's beginning) and she takes the name "Xiang-Ying". Soon, she's assisting him in the cases he takes on as a private detective and vigilante, as Kaori did, although in a rather more active role because of her training.

!!This series displays examples of:

* BadassAdorable -- Ryo is ''still'' the immature, [[LovableSexManiac horny]] [[JerkWithAHeartOfGold and kind-hearted goofball]] that we fell in love with twenty years ago. Xiang-Ying, beautiful though she may be, is far too mature and creepy to qualify for this trope.
* BreakingTheFourthWall -- In chapter 72, Xiang-Ying tells Xin-Hong that "This hair color doesn't suit you. You should change it. I'm sure the readers agree."
* ButtMonkey -- Xin-Hong: just look up one entry. ^
* CheerfulChild -- Miki-chan. She can make [[TheStoic Umibozu's]] heart melt. [[spoiler:Though to be fair, [[GentleGiant it isn't that hard]] [[RealMenWearPink to melt Umibozu's heart]]....]]
* ChildSoldiers -- Xiang-Ying and the other assassins, who were raised from early childhood to be killers.
* ChivalrousPervert -- Ryo Saeba
* ContractOnTheHitman -- Glass Heart's final job from the Organization that trained her was to kill a hitman, and once she goes missing, there's a contract out on her. Several cases in later volumes have to do with this theme as well.
* DoggedNiceGuy -- Xiang-Ying is unaware of Xin-Hong's crush on her.
* GoodFeelsGood
* TheHeart -- Kaori, who is Xiang-Ying's heart literally and figuratively.
* HitmanWithAHeart -- Xiang-Ying is this (it's why she kills herself; she can no longer bear her line of work) and is it even more once she has Kaori's heart inside her. Ryo is also this, of course, and several other characters.
* HyperspaceMallet -- Xiang-Ying inherits the ability to whack Ryo over the head with one from Kaori, and later in the manga Kaori's sister turns up--and she also has the ability. ''Poor'' Ryo.
* ImprobableAimingSkills: ''Everyone''. Almost no ImperialStormtrooperMarksmanshipAcademy skills. That's including [[HandicappedBadass blind-as-a-bat Umibozu]] and [[{{Mooks}} the enemy's regular soldiers.]]
* LadyOfWar -- Fang-Yu Ya; leader of Black Panthers. [[{{Tsundere}} She claims]] [[SlapSlapKiss that she hates Saeba]].
* LiteralChangeOfHeart -- Pretty much the premise.
* NeighbourhoodFriendlyGangsters -- The Syndicate is full with this; even most of their [[EliteMook special operatives]] turn out to be [[PunchClockVillain quite nice guys]].
* {{Qipao}} -- Xiang-Ying wears one while working as a waitress in one episode.
* RealMenWearPink: Umibozu's hobby is taking care of flowers. [[spoiler:In the old days, he tried to hide this from his comrade soldiers; fearing that others will look down on him. When they found out, they couldn't care less, [[CrowningMomentOfHeartwarming even taking turns to tend them when he was injured in the field.]]]]
* SharingABody -- Xiang-Ying and Kaori
* TheTriadsAndTheTongs -- TheSyndicate that trained Xiang-Ying is a Chinese organized-crime syndicate from Taiwan, which is also the nationality of Xiang-Ying and Xin-Hong.
* WarForFunAndProfit -- But most of the time, their idea of fun is "helping people in need" or "making a flower field".
* WeHelpTheHelpless -- The City Hunter team. Partially subverted with Ryo who only helps women, since [[LovableSexManiac he's always keen on mixing lechery with work]].
** Though apparently this trope is the hobby of ''every'' mercenary involved with him.