The daring explorer Serena and the kindhearted succubus Nerisha meet by chance in the depths of the Underground. Succubus Research Diary is an adult visual novel about the unusual and very intimate relationship between the two women.
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6 user reviews - Need more user reviews to generate a score
Release Date:
Sep 6, 2021
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Mature Content Description

The developers describe the content like this:

This game contains explicit depictions of consensual sex and uncensored genitals. All characters depicted are 21 years old or older.

The story takes place in a female-only fantasy world, in which all women possess the intrinsic magical ability to become temporarily "futanari," i.e., grow male genitals (note: it is possible to finish this game without playing any futanari scenes).

The adult scenes in this game are either female x female (~70%) or futanari x female (~30%).

About This Game

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.

The two women meet 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...

Features (Ver. 1.2.0):

  • Length: 74000 words (4-7 hours)
  • 1080p resolution
  • Rich background story about the problematic relationship of succubi and humans
  • Each adult scene has 5 stages with unique conversations
  • Have sex and conduct research to unlock more adult scenes
  • Juicy sound effects and a separate volume slider for sex sounds
  • CG & scene gallery

System Requirements

Windows
SteamOS + Linux
    Minimum:
    • OS: Windows Vista or later
    • Processor: 1.2 GHz
    • Memory: 1 GB RAM
    • Storage: 850 MB available space
    Minimum:
    • OS: Ubuntu 12 or later / SteamOS
    • Processor: 1.2 GHz
    • Memory: 1 GB RAM
    • Storage: 850 MB available space

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