The spark of life shines within her.
Her hair, clothes, eyes, and surroundings—customize them all to your taste.
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　　　Precision Simulator
~Physiological Responses × Ultimate Customization~
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Find out more here. This Notion page contains all the information, announcements, and detailed guides:

↓↓↓ Controls tutorial video

↑↑↑Precision Simulator is a fully customizable interactive VR experience in which a woman in your virtual space reacts as though she were alive.
There is no fixed story or scripted event sequence.
Give her the appearance you love,
choose your favorite positions,
and enjoy yourself at your own pace, for as long as you like.

9 positions / 68 animations / 28 eye colors / 12 hair colors / Skin tone slider / Nipple color slider / 6 environments / 6 lighting presets / 5 climax voices / 4 stages of moaning / 19 shape keys

Customization among the most extensive in the industry.
Enjoy your own character—and your own time together.

Even the demo is enough to get you off. You can literally “experience” it for yourself.The defining feature of this game is the character’s autonomous responses.

- Real-time blushing — Her cheeks naturally flush as her arousal rises.
- Natural blinking — She blinks with a human-like rhythm.
- Realistic gaze tracking — She looks into your eyes, complete with subtle shifts in her gaze.
- Microsaccades — Even the tiny, involuntary eye movements of a living person are recreated.
- Changing expressions — Her expressions change smoothly and expressively.
- Breathing-linked movement — Her chest and shoulders rise and fall with her breathing.
- Responsive moaning — The tone and intensity of her voice change with her arousal and your thrusting pace.

Even when you do nothing, she keeps breathing.Arousal Parameter
This parameter changes according to her sensitivity and the thrusting BPM while the penis is inserted.

As arousal rises and falls, the following change in real time:
- Automatic selection of climax animations
- Moaning voice groups
- Facial expression groups
- Facial blushing
- Eye movement intensity and gaze behavior
- Heartbeat and breathing rates

Simply spending intimate time together changes her responses automatically—she is “alive” inside your device.

5 climax voices
4 stages of moaning, each supporting an average of 8 BPM levelsCustomize Her Responses
- Blushing intensity
- Gaze expression intensity
- Sensitivity
- Arousal
All of these can be adjusted through the UI.
Design the woman who suits your preferences and mood.

By keeping her sensitivity low and connecting a motorized masturbator, you can also enjoy a “battle fuck” with her.Appearance Customization
- 10 hairstyles, 3 outfits, individual part toggles
- 28 eye colors: 14 human + 14 cat
- 12–13 hair colors per hairstyle
- Breast/nipple size, skin tone and nipple color sliders
- Character scale: 0.5×–2.0×
- Facial editing: chin sharpness, roundness and length; cheek fullness; eye size/position; mouth/nose position; elf ears
- Save/load presets for all settings

Environment Customization
- 6 rooms: studio apartment, prison cell, train, restroom, love hotel
- 6 lighting colors: fluorescent, warm, blue, red, yellow, pink
- Brightness from daylight to near-total darkness

Lighting stays at your chosen brightness while the UI is open. Adjust the brightness slider to preview your lighting settings for play.

Mix rooms, lighting colors and brightness to create moods from daylight to midnight, dim clubs to warm bedtime lighting.Intuitive One-Handed Controls

Primary button—the button closer to you
- Press once: move to the next motion state
- Hold: open the motion state list

Trigger
- Press once: mini ejaculation
- Hold: climax ejaculation

Grip button
- Hold: move as though you are grabbing the space around you
- Press three times quickly: reset the viewpoint or world position

Secondary button—the button farther from you
- Open or close the UI
Thumbstick
- Up/down: adjust thrusting BPM
- Left/right: rotate the viewpoint
- Click: open the mini UIUnlimited Motion State Customization

Create your ideal animation sequence from 9 positions and a total of 68 animations.

- Thrusting speed, with an option to carry it over between states
- Thrusting speed curves
- Minimum and maximum time before transitioning between states
- Freely customizable transition probabilities for any motion stateButtplug.io / Intiface Central Support
Devices confirmed to work:
- The Handy
- A10 Piston SA+
- A10 Cyclone

Reports of device compatibility would be greatly appreciated. Devices supported by Intiface Central are expected to work.

Recommended Specifications
- CPU: Intel Core i5-10400 / AMD Ryzen 5 3600 or better
- GPU: NVIDIA GTX 1660 Super, 6 GB VRAM or better
- RAM: 8 GB or more

Important Notes
- This game requires a VR headset connected to a PC. It cannot run on a standalone Quest.
- Supported connection methods: Quest Link / Air Link / SteamVR
Other OpenXR-compatible setups are also expected to work, although testing has not been completed for every setup. Compatibility reports are welcome.
- There is no fixed scenario or story.
- Please test the demo on your setup before purchasing.
- Detailed credits and license information are available on the gameplay guide page linked below.

Demo Available
Use the demo to check compatibility before purchasing.
You can also test motorized masturbator connectivity.
Although it is called a demo, it includes:
- Missionary and face-to-face seated animations
- No limit on thrusting BPM
- Arousal from 0% to 84%
- Access to the bed environment
- Fully available facial expression changes, moaning variations, and physiological eye responses
- All interactions available
- Unrestricted parameter adjustments
- Motorized masturbator connectivity
More than enough to enjoy yourself.

Climax and customization features have restrictions, but you can still get off with it.
But here’s the thing!!
If you enjoy it enough to get off, I’m confident the full version will give you at least ten times the satisfaction.
For now, please give it a try.

Detailed Gameplay Guide and Latest Information
This page also contains currently reported bugs and responses to those reports.
If you run into trouble, please check here.
Updates to the DLsite sales page take some time to appear, but this page can be updated immediately. You can find the latest information as it happens.

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Please use the following links to submit bug reports, update requests, or requests for the next game.
You can also send a DM on X or leave a comment on Ci-en.

—— Feedback and Requests for Future Games ——


—— Bug Reports ——


Watch the controls tutorial video here:
↓↓↓

↑↑↑v1.0.1
- Fixed a bug that prevented the game from launching through SteamVR and similar setups.

v1.0.2
- Fixed the connection status incorrectly displaying “Disconnected” when a motorized masturbator was connected.
- Fixed bugs when applying slider adjustments.
- Fixed UI layout misalignment.
- Removed one hairstyle and added seven: two ponytails, Side Bun, Cat-Ear Bob, Uni Short, Cozy Bun, and Cat Low Twintails.
- Added a Quit button to the Environment tab.
- Added an option to automatically switch to the male viewpoint when changing positions. Available in the thumbstick-click mini menu and the Parameters tab. Pressing the primary button three times now also switches to the male viewpoint.
- Added an option for the UI to tilt with your viewing pitch, available in the Environment tab.
- Added a standing pose.
- Added saving for parameter and environment settings, allowing you to instantly restore your favorite setups.
- Added skin tone, nipple color, and makeup intensity sliders. Tanned skin is now available.

v1.0.3
- Improved brightness behavior. Previously, lighting became brighter every time the UI opened; lighting now stays at the selected level when the UI opens.
- Added lighting dimming controls.
- Added an Eye Glow slider, which makes a noticeable difference in darker lighting.
- Expanded candle controls: adjustable range, hue, intensity, and whiteness.
- Added more flexible scaling for the character, environment, and player.
Changing the player’s scale changes their position relative to the UI, which can make the controls considerably harder to use.
- Improved the UI. Scroll positions are now preserved when switching tabs, and additional panels reduce excessive scrolling.
- Improved character save slots. The slot limit has been removed, and each slot displays its hairstyle and hair color for easier identification.
- Added a Heartbeat Volume slider.

v1.0.4
- Fixed a bug that automatically saved gameplay screenshots locally. A debugging and recording feature had accidentally been left enabled. I apologize for this.
- Added support for huge breasts! The size range has increased from 0–100 to 0–400.
- Added a Settings tab at the far right to organize features.
- Added an option to enlarge only the outfit’s breasts to prevent clipping. Without this option, breasts can protrude through clothing and look unnatural.
- Added grip-based movement! The grip and primary button functions can be swapped in the Settings tab.
- Added a UI position reset. Hold the UI button—the secondary button—to bring the UI in front of your eyes.
- Moved options such as world movement and the arousal display toggle into the Settings tab, along with various other UI adjustments.

v1.1.0
- Major improvements to appearance.
- Major improvements to breasts. They now react when touched by your hands. With the UI closed, hold the grip near a breast to squeeze it, or near her head to stroke it. Both interactions increase arousal.
- Added English, Simplified Chinese, and Traditional Chinese support.
- Fixed arousal failing to increase during cunnilingus animations.
- Added support for rotary devices such as the A10 Cyclone.
- Added rapid, small movements for motorized devices during climax sequences.

A lot has changed. I’ll explain the details on Notion.