Also it's like a pipe dream of mine to rewrite the Angelic Love some day and turn it into a long and good story with lots of sex, guro and love.

Current concept for it is the following:

Angelic Love rewrite concept

(an idea of how to rewrite Angelic Love with my improved skill)

First of all, there are no Angels or Evas in this world. NERV is just a very powerful scientific organization, powerful enough for the law to turn a blind eye on whatever questionable doings they might do, but still a private organization. And so, when Shinji, receives a letter that his father died and arrives at the funeral he also discovers he inherited NERV. Of course, most of the control of the organization falls to the hands of adults like Fuyutsuki, Misato and Ritsuko, so Shinji doesn’t have to worry about it that much. Still he’s curious to what his new possession is, so they at least give him a tour over the organization. Like here’s our physics lab and it works on this, and here’s our chemistry lab and it works on that… “And what’s here?” Shinji asks, pointing at another door, only to find out nobody really knows. After some deeper research it is discovered that beyond this door is a long forgotten personal experiment of Shinji’s late mother Ikari Yui (born Ayanami Yui). Being Yui’s son somehow enables Shinji to both unlock the door and access the info on the experiment in the computers (maybe it’s based on the DNA or maybe a password is some of their common memories).
The experiment was basically to create a lifeform that would be not unlike humans, but at the same time superior physically, mentally and, maybe the most important, morally. To create Angels. The result of the experiment was Rei, an Angel based on Yui’s own DNA, which gives her the surname Ayanami. And behind the locked door they find a small room where Rei lived all alone forgotten by everybody all the time since Yui’s death. She has no clothes of any kind, she has a bed, a bookshelf and a computer with a voice interface (like in Star Trek) which was her only talk partner. Also there’s a still functioning automated factory of spare bodies, as one of the abilities of Angels is on death to revive in a spare body.
Now, there’s scat version and no-scat version. In no-scat version there is also a still functioning automated food dispenser and a toilet.
In scat version maybe there is a food dispenser, but it haven’t worked for a long time. Rei’s angelic nature allows her to feed on her own shit for some significant time, so that’s what she did. It’s still not forever though, as there’s still the energy conservation principle, so eventually she would die of starvation and automatically revive in a new body. Then she would also feed on her rotting previous body. In the end it all resulted in being used to such food and normal human food now tastes disgusting to her, so she would ask for shit and rotten food to eat and pee to drink. The most normal thing she would find to her taste would be cum.
Rei learned human language (or maybe even more than one language) through talking to the computer and reading books, but as the computer voice never showed any emotions, she never learned to express hers. Since she had no toys, the only thing she could play with was her own body, so she did it a lot, and it is the only way she knows of having fun.
Being partly Yui’s clone, Rei is now the only family Shinji has. But not just genetically: Shinji feels such a feeling of belonging to Rei he has never felt (or rather he doesn’t remember as he was too little when his mother died), so he immediately accepts her as his sister and dedicates his life to her. He brings her out of NERV, makes her live with him and attend school with him. Her specific upbringing create some problems though.
First, she never ever wore any clothes, so when Shinji introduces her to clothes, she finds it disagreeable. Maybe by showing her the school code mentioning one should wear a uniform at school Shinji can make her wear uniform, but she would only do it as much as it is written in the code. It says in school, so she will strip as soon as she leaves the school and walk home naked (which of course means she will go to school naked next morning and only put the uniform on as she enters the school). It says the uniform consists of a blouse, a skirt and school shoes, so Rei won’t wear any panties, bra, or any other clothes not directly specified by the code. Naturally, Rei would always be nude at home or anywhere she goes beside school. With all the sex she would have in school, eventually the school will give up too and just let her go nude at school too.
Second, the most natural form of interaction with other people for her is having sex with them. This comes from how the only person she ever interacted with was herself, and the only form of interaction was playing with her body. So it quickly leads to Rei having sex with everyone. Of course, seeing how it makes Rei happy Shinji doesn’t resist and only encourages it.
Eventually, BDSM and guro appears in the story. Shinji is curious to explore Rei’s angelic abilities, and as soon as he discovers Rei doesn’t mind being hurt, tortured and even killed, he begins experiments. Eventually both Shinji and Rei discover it does not only provide valuable scientific data, but also is a lot of fun. So they start explore the fun side of it too.
At some point it is revealed there was also another Angel, Nagisa Kaworu. He was held in another lab, maybe as far as Germany (but maybe just next door to Rei), but somehow managed to escape soon after Yui’s death and lived among humans all the time. As Kaworu sees the news about Rei, he realizes he doesn’t need to be afraid anymore and if he reveals himself as an Angel, he won’t be captured and tortured. And so he does, arriving to Shinji and Rei. His girlfriend Asuka follows him. Shinji is more than delighted to meet another Angel, as it means his beloved Rei can now have children. Shinji is extremely thankful to Kaworu for impregnating Rei. In exchange he might impregnate Asuka, or maybe not, after all Asuka can be impregnated by any human out there, so it doesn’t have to be Shinji. Maybe instead Shinji organizes good life for Kaworu, like a good house and lots of money so Kaworu doesn’t ever have to worry about surviving anymore.
And thus, the race of Angels is continued.
P.S. Ah, and also Shinji won’t have any sexual feelings for Rei as he sees her as his sister (which doesn’t stop her from being the most important person in the world for him, that he devotes his life to, he will marry her, spend all his life together with her and raise her children, but there’s just nothing sexual in this relationship).

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Also at some point I thought of making Kaworu the protagonist and so decribe love between two Angels (that would also better correspond to the title Angelic Love). That was just a vague idea that I threw away when I came up with the detailed concept I described above. But as I was now writing it down, a though came to my mind: so what if instead of Angels being able to have children only with Angels, it’s that male Angels can’t have children and Angel girls can have children only with human males? This way Kaworu and Rei can have just the relationship I have in mind, where Rei will not just have to have sex with someone outside the relationship to get pregnant, but will have to have sex with many different men to give birth to many different children to ensure genetic variety among them. Well, something like that. Anyway, just a quick idea that I feel too sleepy to think of more details right now.