Lust Reaction is a 2D animated dating sim by Kopkop, built in the Others engine. You begin at your parents' house and manage daily life, stats, money, and success in a detailed world. The game lets you explore locations such as the University, City Center, and local businesses, then buy properties and run companies as your influence grows. You meet many characters with separate stories, personal tastes, and changing closeness. Through its interaction system, you build relationships and unlock explicit adult scenes as you follow their quests.
Development is ongoing, and the current build is v0.3.0, released April 6, 2026 for Windows in English, with no censorship. The latest update added female protagonist support, letting players choose a name and gender at the start and change them later from the bedroom. Existing storylines were adapted for a female player, with new paths for certain characters, and four characters gained bisexual routes. Talk and Flirt were separated and improved, while the Talk menu gained beta lore and backstory options. Quest progression no longer requires arbitrary money gates, tying cash needs more closely to the plot.
Developer's description
In
Lust Reaction
, you step into a vibrant life simulator set in a detailed world. Starting from your parents' house, you must manage your daily life, improve your stats, and build your path to success.
The game features a sandbox experience where you can explore various locations like the University, City Center, and local businesses. As you grow your wealth and influence, you'll be able to acquire your own properties and run businesses.
But it's not all about work; meet a diverse cast of characters, each with their own unique stories, fetishes, and evolving intimacy. Through a dedicated interaction system, you can build relationships that lead to high-quality, explicit scenes as you progress through their individual quests.
v0.3
The Big One: Female MC Support
Gender Selection:
Added the option to choose your name and gender when starting a new game.
On-the-Fly Customization:
You can now change your gender and name at any time from your bedroom.
Adapted Quests:
Modified existing storylines to fit the female protagonist, introducing completely fresh paths for specific characters.
Bisexuality:
Introduced bisexual preferences/routes for 4 characters in the game.
Revamped Interaction System
Separated and overhauled the
Talk
and
Flirt
mechanics.
The
Talk
menu now features deep-dive lore and backstory options to get closer to the characters (Beta phase).
Progression & Balance Overhaul
Goodbye, Mandatory Grinding:
Removed arbitrary money gates for quest progression. Cash requirements are now strictly tied to plot-relevant moments, allowing for a much smoother story experience.
New Event System Engine
Completely rebuilt the core event framework from scratch to allow for much more complex and dynamic content in upcoming updates.
⚠
Beta Notes:
Minigame rewards for the female route are still a work in progress (reward scenes will temporarily display the male MC).
Due to major structural code changes, you might encounter bugs. Please report any issues!
Click to expand...
v0.2.1
Video Compression Overhaul:
All video files have been heavily optimized. The game's total file size has been significantly reduced while allowing for even more high-quality content.
Visual Redesign:
The UI has been completely rebuilt with a friendlier, more intuitive aesthetic. Menus are now cleaner and easier to navigate.
Achievement System:
A brand-new system to track your progress.
Event System (Beta):
A new framework for tracking special events. Each event now has an
associated achievement
, acting as a checklist so you never miss out on available content.
Coffee Shop 2.0:
The Café minigame has been revamped with improved mechanics, better visuals, and balanced rewards.
Patreon Cheat Menu:
Exclusive for supporters! A redesigned cheat menu that is more comfortable to use, featuring new functions to customize your gameplay experience instantly.
v0.1 Beta Release
5+ hours of gameplay content.
4 unique character storylines available.
New locations: Sakura Coffee, IronBros Gym, University Library.
Implemented Stat System (Strength, Intelligence, Fame, Seduction).
Early implementation of the Character Interaction System.
Multiple explicit scenes added per questline.
