A Web Serial Novel by Magic Conan 14 (aka Courage's admin) that can be read here. However, in the spirit of Tumblr, the latest chapters appear first. It's an Urban Fantasy story which is explained to be "a D.N.Angel parody and [an original story counterpart] to Stealing Stars (a dead fic) and Best of Luck, Tantei-kun".The continuity goes like this:
Ro.Te.O. The story of two boys, Ryou and Tetsuya, who discover their pasts as angels and have to deal with the baggage that comes with their alter egoes. They're not alone, though - not only do other angels exist, but demons do too. Said demons want to bring about The End of the World as We Know It, too...First published in 2013, unfinished yet being elaborated on in the revival. Its name was changed to Resurrected Angels in chapter 10 and Rebirth keeps that name.
Crimson. A spinoff to Ro.Te.O written in script format, see a summary of it next to the Show Within a Show entry. First published in 2013, unfinished and unable to be accessed due to its home tumblr being deleted.
Resurrected Angels: Rebirth (found at the same link as Ro.Te.O). An Alternate Continuity of Ro.Te.O. First published in 2014, ongoing.
Resurrected Angels: Memories (found at the same link as Ro.Te.O). The backstories for the Rebirth characters. First published in 2014, ongoing.
Note that the heading's spelt Ro.Te.O, not the way it appears at the top of the page.There's a character sheet too. Character tropes should go there.
Ro.Te.O and revival!Ro Te O contains examples of: (The revival will only change where noted.)
Aerith and Bob: Averted with the human names since the setting is of the "cosmopolitan" variety and most of the names are actual Japanese ones. (Martin might be the odd one out but it was probably deliberate, taking into account the author has done Coldplay shoutouts before and has also mentioned a character called Chris...) The angel/demon names are naturally of the "Aerith" type except Gabriel, Raphael (YMMV), Ariel (in a Memories entry) and Michael.
All There in the Manual: All sorts of interesting tidbits can be found if you look through the other Ro.Te.O/Crimson posts as well as Superhero Project (for Martin, Ryou and Tetsuya only). Tetsuya's a common target for All There in the Manual, as this post proves. The targeting, however, is also justified in that post - Tetsuya is one of the author's favourite characters.
Alternate Continuity: Each revival is one to their original. Made especially important in revival!Crimson, where magic has only existed for about 30 years (set in the future) compared to original!Crimson (set in the present).
Bishōnen: See Cast Full of Pretty Boys below. Taken to the extreme by Astaroth/Skyrua, who manages to pull Lucifer in with his handsomeness (and it's noted that it's not meant to work on Lucifer), but the biggest offender is Avisel, who is described as putting even Musei to shame...and Musei is feminine-looking.
Cast Full of Pretty Boys: Well, the story was described as a parody of D.N.Angel, so it makes sense to at least have a few...but almost everyone in the cast is a guy.
Five-Man Band: Out of the original's main group: Ryou (type III, although does have the "sense of justice"), Tetsuya (although he's originally The Smart Guy), Katsuo, Martin (although Katsuo's and Martin's roles switch for the revival, as Katsuo uses his fists more) and Kaede.
Four-Temperament Ensemble: The angels of the original have this lineup - Ryou is Sanguine, Katsuo is Choleric, Tetsuya is Melancholic (although he isn't the angel of justice) and Kaede is Phlegmatic. Out of the combos, Yuuki is the Artisan and Satoshi is the Idealist. Sora is another Sanguine.
Canon Immigrant: The White Knight, first introduced in a Detective Conan fanfic of the same name. This time, the Knight is part of a family who have their own "Crimson taskforce". In revival!Crimson, the eponymous guy, Daichi, Reika and Hanaka are the immigrants from the original - although a few changes are in place, the biggest being that Daichi and Crimson aren't the same person.