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Hentai Tales: Overflowing Sister
My older sister Rin is impossible to ignore. Her tempting body and our casually intimate daily life slowly blur the line between sibling affection and something much more dangerous.

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Features
Single-player
Steam Achievements
Steam Cloud
Family Sharing
Steam is learning about this game 
Languages:
Interface Full Audio Subtitles
English ✔ ✔ ✔
French ✔ ✔ ✔
Italian ✔ ✔ ✔
German ✔ ✔ ✔
Spanish - Spain ✔ ✔ ✔
Russian ✔ ✔ ✔
Japanese ✔ ✔ ✔
Ukrainian ✔ ✔ ✔
Simplified Chinese ✔ ✔ ✔
Traditional Chinese ✔ ✔ ✔
Portuguese - Portugal ✔ ✔ ✔
Korean ✔ ✔ ✔
Malay ✔ ✔ ✔
See all 13 supported languages
This game is not yet available on Steam

Planned Release Date: Jun 5, 2026

This game plans to unlock in approximately 2 weeks

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Mature Content Description

The developers describe the content like this:

This game contains a large amount of extremely sexual content.
It may not be appropriate for all audiences.
It may contain potential incest contents.
Please make your own judgment before playing the game whether you meet the requirements for playing such games.
The story is purely fictional.
All characters appearing in this game are adults over 18 years old.

About This Game

GamePlay

Enjoy a sensual story while completing tricky puzzles!
Connect the numbers sequentially, using all of the squares on the board
After completing a puzzle, you will unlock a sexy new image and the next part of the story!
Can you complete every puzzle and meet all of the girls?!

Story Background

My older sister Rin is impossible to ignore.
Her tempting body and our casually intimate daily life slowly blur the line between sibling affection and something much more dangerous.
A mysterious "room" becomes the catalyst, pushing our forbidden desires into reality and forever changing our relationship.

Characters

Rin Shinozaki:

Your beautiful older sister, four years your senior.
A sharp advertising planner by day, she hides a needy, physically affectionate side only you see.
Her voluptuous figure and teasing dominance mask a deep, growing dependency on you.

Features

  • 20 sexy and erotic images of beautiful girls.
  • A fantastical erotic story with girls who have unique personalities.
  • You can skip the puzzles if you just want to enjoy the story. (Press Enter during a puzzle).
  • CG Gallery mode. (Click the left and right buttons next to the CG after completing a puzzle).

System Requirements

Windows
macOS
SteamOS + Linux
    Minimum:
    • OS *: Windows XP, Vista, 7, 8, or 10
    • Processor: 4GHz+
    • Memory: 4 GB RAM
    • Graphics: 512MB
    • Storage: 800 MB available space
    Recommended:
    • OS *: Windows XP, Vista, 7, 8, or 10
    • Processor: 4GHz+
    • Memory: 8 GB RAM
    • Graphics: 512MB
    • Storage: 800 MB available space
* Starting January 1st, 2024, the Steam Client will only support Windows 10 and later versions.
    Minimum:
    • OS: Mac OS X 10.7+
    • Processor: 4GHz+
    • Memory: 4 GB RAM
    • Graphics: 512MB
    • Storage: 800 MB available space
    Recommended:
    • OS: Mac OS X 10.7+
    • Processor: 4GHz+
    • Memory: 8 GB RAM
    • Graphics: 512MB
    • Storage: 800 MB available space
    Minimum:
    • OS: Ubuntu 20.04 or higher; SteamOS
    • Processor: 4GHz+
    • Memory: 4 GB RAM
    • Graphics: 512MB
    • Storage: 800 MB available space
    Recommended:
    • OS: Ubuntu 20.04 or higher; SteamOS
    • Processor: 4GHz+
    • Memory: 8 GB RAM
    • Graphics: 512MB
    • Storage: 800 MB available space
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