Succubus Research Diary

by Arcus Plume

Uncensored Windows
Versionv1.5.1
EngineRen'Py
Released2022-12-08
Updated2026-04-09
LanguageEnglish

The daring explorer Serena and the kindhearted succubus Nerisha meet by chance in the depths of the Underground, as Serena accidentally stumbles upon Nerisha's doorstep. After learning of each other's circumstances, they strike an unusual deal. A deal that involves the two of them having lots of sex... Spoiler: Characters Nerisha is a young adult succubus who has never had sex. This is something of a problem to her because succubi can't fully develop their magical powers unless they have some sweaty fun with humans or other humanoids. However, having high ideals of equality, Nerisha is unwilling to get herself a sex slave as most other succubi do. Serena is a human explorer who got separated from her expedition after something unfortunate happened. She's a mature woman with plenty of sex appeal that she doesn't hesitate to put to good use.

Version 1.5.1 A small post-final(?) update that fixes a bunch of typos and grammatical errors in the final content update. Version 1.5.0: The Grand Finale The Serena's Services story arc ends with a bang! (Disclaimer: no explosions included.) This content update isn't called The Grand Finale for no reason. It's not only the final update but also easily the biggest one. With a word count of over 11000 words, it's approximately as big as the two previous updates combined! Of course, there's plenty of new art as well! The mysterious noblewoman Lady Julie was briefly seen in the previous update, but now it's time for her to get into action. Be warned that she's a woman who can't be easily stopped once she has gotten started... New things in a nutshell: New character and event art Lady Julie starring in the new 11000 word story New achievements Other changes and fixes: A handful of typos fixed in previously released content Some small tweaks to in-game menus How to access the new content? Serena's Services can be accessed after reaching Ending 1. You'll have to play most of the previously released episodes to unlock the final episodes. If you have already done so, Episodes 7 and 8 are waiting for you! In other news: Arcus Plume has a newly-opened developer page on Steam. You'll get a notification of new releases if you click the follow button. The next Arcus Plume game will be announced in Q1 2023. Lady Julie is one of the major characters of the game! Who knows if there will be other familiar faces as well... And finally... Have fun playing The Grand Finale. Version 1.4.0: An Old Friend Sometimes, a chance encounter with an old friend may open up new possibilities. What lies in store for Serena and Nerisha? Only time will tell... It's the first anniversary of the release of Succubus Research Diary, and here's a little something to celebrate it: the fourth content update! This update adds two more episodes to the "Serena's Services" story arc and introduces two new characters to the game! New things in a nutshell: New character and event art New 4500 word story featuring Denice and Julie New achievements How to access the new content? Serena's Services can be accessed after reaching Ending 1. Playing episodes 1 and 3 will unlock the newest episodes. 2 and 4 are not required for mysterious reasons. Version 1.3.1 This is a small update that corrects a couple of dozen grammatical errors and typos. Version 1.3.0: Nerisha's Services It's Nerisha's turn to be the protagonist! The story so far has been told almost exclusively from Serena's point of view. But not this time! It's time for the cute succubus Nerisha to bask in the spotlight! Oh, and she will also meet Jenny for the first time. And not only meet her... Nerisha's Services is essentially a sequel to Serena's Services (added in version 1.2.0). To Nerisha's dismay, the new content can be found in the Serena's Services submenu. New things in a nutshell: New event art New 7000 word story featuring Nerisha as the protagonist! New achievements How to access the new content? The Serena's Services submenu can be accessed after reaching Ending 1. Nerisha's Services becomes available after playing the first episode of Serena's Services. The final episode requires you to play all other episodes first. Version 1.2.0: Serena's Services The second content update is here! Serena's Services expands the story in a new direction as well as introduces a new character, Jenny, to the game. What does Serena do to make the big bucks and what does it have to do with Jenny? It's time to find out! New and shiny things: New character, background, and event art New 5000 word story about Serena's business with Jenny New achievements How to access the new content? You will find "Serena's Services" in the main menu of the game. If you have already reached Ending 1, you can access the new content right away. If not... well, you know what to do. Or not do. Version 1.1.0: Little Epilogues This is a content update that adds epilogues to the game: one for each ending. Find out what Serena and Nerisha are up to shortly after the endings! This update adds the following: More content: approx. 5000 words and 3 event CGs (+23 variants) 2 new achievements New functionality in the 'Sex Scenes' gallery: shortcuts to endings and epilogues There are two ways to access the new content: Reach an ending and you'll see a new choice that leads to the respective epilogue. If you have already reached at least one ending, you'll find a new button in the 'Sex Scenes' gallery that opens a list of shortcuts that lead to the endings and epilogues. May your mana reserves be sufficient.
ILIYAK 2024-05-12
I hate it. The Pictures and the Story are good enough to capture your interest. They are so good, that I still wanted to complete the whole story. But! This story, majorly, gets in the way of arousal. (There are countless finer details, concerning sex-terms, which gave me a rather sensible turn-off, but they are not the main issue). The story is far too cozy and ever-present: Introduction with lots of normal conversations? Sure, why not. Sexual training with lots of casual chatter? Questionable, but can pass in the beginning. An average of 2 arousing sentences per Sexual encounter of 100+ dialog lines? That's not my cup of tea. Each time it took me, at the very least, 1.5 hours to cum with this game, and that is something I strife to avoid via playing such games.
Jalin 2023-03-09
I find myself with a slightly odd opinion on this one. The art is good, even if the images are someone limited in number. The writing is quite solid, both technically and creatively. The story, too, is at least mildly interesting. For all of these reasons, this work get's a solid four stars from me. The one missing star is because of that aforementioned oddity. Specifically, that the story and sex are weirdly vanilla for the story's premise. The story is, to be perfectly honest, more fluffy and warm hearted than it is actually hot. At least for me, that fact combined with the relatively limited amount of art, means I can't QUITE bring myself to give it five stars. But others might well prefer it that way. If you like a fairly sweet lesbian romance of sorts, it's certainly worth giving a try!

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