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The Incubus System
The Incubus System
7.31M Views 106725 Favorites 640 Chapters 2 Chapters/Week 8197 Readers
4.4 (654 ratings)
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An 18-year-old poor college student tried to apply for a job as a tutor but his life almost ended as demons' meal. In his last breath, a mysterious woman gave him a strange power. When he opened his eyes he had turned into a demon with a system that would turn him into... A pervert.

Now he must lived with his dual identity as a model student named Ethan and an incubus named Damian.

>Cover by commission @Yukinerashi from IG

Angels BDSM Demons Elves Exhibitionism Fantasy World First-time Intercourse Hiding True Identity Incest Incubus Magic Magic Beasts Maids Master-Servant Relationship Modern Fantasy Monster Girls R-18 Succubus Tentacles Threesome Weak to Strong
Related Series
Demon Lord’s Succubus (Shared Universe)
Table of Contents 640
Reviews 18
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    Status: c13
    I started reading this with my wife on a road trip to keep us awake, she doesnt really read and was not eager to read this out loud on the trip. By the end of the trip we both agreed that the author needs some editing on the early chapters, but we were actually interested in the plot and had fun.
    It was also precious seeing her have to stop from time to time beet red out of embarassment at the things she had just said.
    10/10 would wife again.

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    83 Likes · Like
    Status: chapter 80. a demon who fell...

    I don't recommend any reader to read these type of stories anymore, because they are just smut focused. And it can quickly rot your brain later on. Also, they don't have that much of nice plot. So I do recommend that you the reader find something more interesting and fun. Stay safe everyone and be careful!

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    34 Likes · Like
    Status: chapter 17. envy

    Alright so.... confession time. I started reading the story because I was expecting a lot of s*x scenes. There I said it... But, there is more to this story than just smut.

    This story has a lot more to offer. It is not just about him mindlessly having s*x. There is character development, moral issues, family issues, and a plot that is much bigger than you may have initially thought.

    I don't want to shed too much light into the story. I want you to read this story with whatever precognition you may have about it, and be blown away by some of the best story telling I have ever seen for a story about a guy having s*x. 

    If you can get over the s*x, and over the tags (which were quite enticing lol) and read this story for the plot, yes the plot, not the s*x... you are going to be very pleased by it.

    I hope you give it a try. It is definitely worth a read... now excuse me. I have to, um, "relief" my self. 


    I don't know if it's just me, but doesn't the head of the girl in the cover picture for the story look like it is floating off the body? Almost like her hands are holding it and not her neck? It was throwing me off so I wanted to make other people see it too. Then I won't be the only crazy person 0_0

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    Status: chapter 360. infiltration to the dark...

    The writing quality, the character interactions and most of the plot are all very well done. Everything else though has issues. 

    The story has one pace that never changes, which doesn't feel slow and seems fine at first but becomes a problem with the timescale involved. Over the course of roughly a week, the MC goes from a wimpy single man into a prince with a harem of a dozen of women. Not a single woman even disagrees with the scenario and with how short the timeframe is it's just not believable and undermines their characters. Moreover with how much is crammed into such a short period of time (new characters, s*x, combat, travel, repeat) the story has to keep constantly bouncing and shuffling. It makes it feel like the MC has no control and lacks agency, and that character arcs are snipped short to fit in the next. The story and timeframe is too cramped.

    The common harem problems also apply in this novel. Girls with no meaningful background or personality being added into the group in an instant. (4 demon gals all at once) Meaningful members of the group losing screen time and becoming rather one dimensional in character. (Celia loves the MC despite everything and that's about as far as her character development got) The harem is too rushed and too large. The way in which it's implemented (rushed) lowers the quality of the story as a whole, and devalues the characters within it. 

    The lemon scenes are another problem. The character interactions and the lead up are fine, but the actual scenes themselves are to put it simply; not good. Every lemon reads exactly the same just with a different gal and lead up. There's very little feel, description or depth. For someone who literally sells s*x chapters/scenes/pics/audio clips and whatnot on Patreon, the quality should be far better and not feel like flat repetition. 


    'Literotica' or 's*xstories' are both free and much better for that sort of thing.


    Similar to the lemons, the combat scenes have the exact same problem. As long as you know the characters involved and skim their interactions the rest is useless. You can safely assume the MC will win using some black spikes against many demons and will grow stronger. The complete useless damage stats will fly by, the character stats will increases and he will unlock an arbitrary but useful new skill via a tree and method that doesn't matter. Every combat chapter is essentially a filler chapter and falls flat.

    There's a few other little niggles like the irrational reporter character who somehow hasn't been arrested and simply doesn't fit into the setting of the story. (She's literally trying to expose a demon hunter to the demons) The chapter lengths feel like they're shrinking and they're already short and occasionally 1/3rd filled with Patreon stuff. So the sales pitch is a bit strong with this one and the word count stat is a bit off.

    This is a story that I wanted to like, but at nearly every turn rubbed me the wrong way. I wish the author the best and hope others enjoy the story more than I did, but I'm out.

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    Status: chapter 39

    I like the direction and speed of the actual plot, but when it comes to the characters. It's a modern day fantasy world and the world shares the same universe as another novel by the same author (which is in my to be read list)

    But I feel like their bodily descriptions are like test dummies. Hell the only thing I know about the MC is that he is either skinny with brown hair average face or swimmer buff with with blue hair and pretty face. That's not much to go off of. 

    Example I met my neighbor who is a elf wearing a dress.... their is no bodily description shoot she could even be a dark elf or a light skinned elf with a huge rack, blonde hair that's long enough to reach her knees oh she's also only 5 ft etc etc or

    I the MC am a dark skinned African man, skin almost black as oil, with a small afro. Skinny but still have muscle and your average height and weight. You could say I'm your average dark skinned male etc etc. 

    The MC could use the basic type of description cause the MC is more of a vehicle but the world and side characters should be detailed before they have actual plot involved or just give us a actual picture. 

    Love the story so far but my mind has to fill in the MAJOR gaps on what the characters looks like and the world. 

    Other then my guess of a modern world there's nothing to go off. It could be a fantasy world with modern or just a "normal" modern world. Shoot they could have trains powered by magic cause its the fantasy based instead of scientific based. 

    Its crazy Im saying this (I have read a lot of "curltured" novels) I need more character and world development for my "plot scenes". 

    Now I might have missed some paragraphs of character bodily description. If I did I'll reread and alter rating. 

    But at this time it's bugging me so much that the author didn't offer any world building or any description for the characters other then the most basic information of name gender and race. 

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    13 Likes · Like
    Status: chapter 149. silent tears

    Hahhhh That was a good binge. Not the best story but still a fun one. Except the ero scenes, they're the best. Then I'll keep this short by saying what I think the overalll worst parts are.

    -Power dynamics is just clunky. It seems that only a few select number of people is fighting for world peace, and humans are not included in that. It just feels weird to have the power concentrated on just a few characters. 

    -Organizations doesn't look real. They don't look organized at all. They need to be more imposing than this. Their collective power should seem to be able to affect the story and not just be there as backgrounds of characters.

    -No division of plot. At this point it'll need a 1k chs to wrap this up and it'll be just one loong arc. At this point point there should be multiple conclusions but there's not. All the major things that happened at the start are still ongoing.

    -At the end, it seems like there's too much info withheld from the readers. There should be info-dumps at the beginning to create a solid outline of everything before reaching this kind of tension.

    I don't know but it seems most of these things are parts of the settimg. This may be weird but I think the author should consume more shounen anime/manga stuff. Like their setting, plot progression, organization, conflict, etc. Taking inspirations from them will probably make the novel more believable and concrete. 

    Disclaimer: No hate, only love. I still like this that's why I gave this a 4. And I only read things and haven't wrote a single page of a novel so this might came straight out of my ass.

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    9 Likes · Like
    Status: chapter 334. one night cinderella i

    Amazing book a even amount of smut and development this is one I am gonna stick to the end with 

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    8 Likes · Like
    Status: chapter 39. guilt

    This is basically a “smut + plot” as I've seen other people referring to the smut novels on this site. You can tell the smut is the central aspect of the novel, though the plot development is enticing enough to make you want to keep reading chapter after chapter.

    Our protagonist is a hard-working young man that cares for his sister, though Lady Luck hasn't really favored him throughout his life. During a job interview, he's assaulted by demons, and saved by a mysterious succubus that grants him, what I personally call, “the horny system, ” and now he has to f**k women to survive.

    Surprisingly, for a smut + plot, the main character has some depth to his personality – he's not so unbelievably dumb (though he's conveniently obtuse on occasion), and he's not that much of a pushover, especially in the +18 scenes.

    Moreover, he at least has some degree of character development, going from being terrified due to suddenly becoming a demon, then struggling to merge his newfound identity with his former self, to deciding to use his power to protect those he cares about (mostly the ones he has s*x with). The other characters, however, are mostly one-dimensional with the exception of his sister. On the other hand, the short length of the chapters doesn't really allow for much character development. We'll have to see.

    The s*x scenes are good. Clearly, the author has no qualms about incest or kinky tentacle play, among other things. They're definitely boner-worthy, but I wouldn't say they're at the level of making my balls explode in agonizing pleasure, partly due to what I'll explain now – probably my main problem with this fiction.

    The grammar and writing style. Now, it's abundantly clear to me that the author is not a native speaker of English. More than misspelled words (of which there aren't any as far as I remember), it's the use of the wrong tenses and the awkward phrasing of some lines. Additionally, the author's writing style is somewhat plain and uninspired. I think that I'm very picky when it comes to grammar in novels, and I was about to just drop it 10 chapters in, but then I started to notice that it got progressively better as I kept on reading. I mean, sure there are still a lot of the aforementioned misuses of tenses and awkward phrasing, and it could certainly use an editor, but seeing the author's determination to keep getting better at writing, and how much I started to like this novel, I can let them slide without bothering me that much. They're not really a deal-breaker to me, though it might be for you, especially if you are a native speaker.

    I genuinely think that the author is onto something special right here. Granted, they might not be the most verbose and eloquent writer I've seen, but for some reason, I'm oddly attracted to the characters, the plot, and the world of this serial.

    TL;DR: mainly a smut, I like the plot and characters, but the grammar mistakes and rather mundane writing style might be a turn-off for some readers.

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    8 Likes · Like
    Status: Chapter 191. Tempestechnologies

    The story has been fantastic so far. I ended up subscribing on Patreon for the sole purpose of encouraging the author to continue writing. Honestly, it deserves an anime adaptation.

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    7 Likes · Like
    Status: chapter 121

    My friend told me about this story. I thought it sounded alright so I tried it. I got hooked instantly. Personally I find the storytelling absolutely amazing. Emma is a waifu. But can we talk about naming 2 sisters diamond and pearl. Sounds like the title of a certain gen 5 Pokémon game. Anyway like the story

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    7 Likes · Like
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