''Angel Diary'' (''천행기'', or ''Heavenly Chronicles'') is a {{manhwa}} by the artist/writer team of Kara and Yun Hee Lee, more famously known by their previous collaboration, ''Manhwa/DemonDiary''. Largely taking place in modern-day Seoul, it is an UrbanFantasy that chronicles the story of Hwang Dong-Young, the runaway Princess of Heaven, and her quest to escape her ArrangedMarriage to the mysterious King of Hell. In order to facilitate her flight, she disguises herself as a boy and [[CompulsorySchoolAge attends high school]], where she finds herself being hit on by Bi-Wal, a fellow classmate, who is very, ''very'' male.

[[ViewerGenderConfusion Reader gender confusion]] abounds. [[UnsettlingGenderReveal Unsettling Gender Reveals are abundant.]] Watch out for traps. You have been warned.

''Angel Diary'' has been completed in Korea, with 13 volumes released. It was formerly licensed by ICE Kunion, but is now being released by Creator/YenPress.
!!''Angel Diary'' provides examples of:

* BigBrotherWorship: [[spoiler: Bi-Wal]] is younger than Ryung by three hours, and thinks it's horribly unfair that the throne's going to him instead of Ryung. He outright states that Ryung means more to him than the kingship.
* BlowYouAway: While not the only power at [[spoiler: Bi-Wal's]] disposal, it's one that gets used pretty often.
* BodyguardCrush: Doh-Hyun definitely has feelings for Dong-Young.
* ChunkyUpdraft: Happens a fair bit. Especially if someone ticks off [[spoiler: Bi-Wal]] by, say, trying to harm Dong-Young.
* DudeLooksLikeALady: Cho-Ryun the tree spirit. Even a couple of the [[TheFourGods Guardians]] mistake him for a her.
* FantasticRacism: The noble families of both Heaven and Hell tend to hold a rather low opinion of demons.
* GoodWingsEvilWings: Se-In, a demon, has black-feathered wings.
* {{Keet}}: Woo-Hyun.
* [[spoiler: KingIncognito: And boy, is Dong-Young surprised when the truth comes out...]]
* AnIcePerson: Dong-Young would have been the "Winter General" if she hadn't been chosen to marry the King of Hell. Despite her changed role, she can still wield the Ice Snow Sword (a literal CoolSword as well as a DoubleWeapon).
* OlderThanTheyLook: A very common phenomenon among the denizens of Heaven and Hell.
* PairTheSpares: Doh-Hyun and Mi-Hyang.
* PowerMakesYourHairGrow: Dong-Young's short, boyish hairstyle grows out to long, flowing tresses when the seal on her power is released.
* SheIsTheKing: Dong-Young wants to change the "spirit system". To that end, she decides she needs to be the King of Heaven. She doesn't see any problems with this, because there's no law that actually says a princess [[spoiler:or a married woman, for that matter,]] ''can't'' become king. (It helps that her older brothers are a bunch of lazy-asses who wholeheartedly support her idea, since it means none of ''them'' will have to take the job.)
* SweetOnPollyOliver: Subverted. Bi-Wal seems to see through Dong-Young's disguise but in fact [[spoiler:they met long before the story began.]]
* TheFourGods: The Four Guardians, natch. Roll call:
** Kim Ah-Hin, the White Tiger.
** Kim Ee-jung, the Red Phoenix.
** Yun Doh-Hyun, the Black Turtle.
** Yun Woo-Hyun, the Blue Dragon.
* UndyingLoyalty: Se-In is devoted to Ryung Jin, and acts as his servant [[spoiler: even though Se-In is the king of the demons]].
** Hee-Young is [[spoiler:Bi-Wal's]] faithful follower. (Not that he started out that way. Hee-Young's sister ''lost him in a bet'' to the regent of Hell.)
* YaoiFangirl: Several fellow students are passionate supporters of the "romance" between Dong-Young and Bi-Wal. Dong-Young is disconcerted, while Bi-Wal plays along quite gleefully. [[spoiler:Of course, he knows Dong-Young's not a boy.]]