Written by NekoGotoStudio
Table of Contents:
1. Screenshots
2. Installing on Windows Pc
3. Installing on Linux
4. System Requirements
5. Game features
6. Reviews
This guide describes how to use Steam Proton to play and run Windows games on your Linux computer. Some games may not work or may break because Steam Proton is still at a very early stage.
1. Activating Steam Proton for Linux:
Proton is integrated into the Steam Client with "Steam Play." To activate proton, go into your steam client and click on Steam in the upper right corner. Then click on settings to open a new window. From here, click on the Steam Play button at the bottom of the panel. Click "Enable Steam Play for Supported Titles."
Alternatively: Go to Steam > Settings > Steam Play and turn on the "Enable Steam Play for Supported Titles" option.
Valve has tested and fixed some Steam titles and you will now be able to play most of them. However, if you want to go further and play titles that even Valve hasn't tested, toggle the "Enable Steam Play for all titles" option.
2. Choose a version
You should use the Steam Proton version recommended by Steam: 3.7-8. This is the most stable version of Steam Proton at the moment.
3. Restart your Steam
After you have successfully activated Steam Proton, click "OK" and Steam will ask you to restart it for the changes to take effect. Restart it. Your computer will now play all of steam's whitelisted games seamlessly.
4. Launch Stardew Valley on Linux:
Before you can use Steam Proton, you must first download the Stardew Valley Windows game from Steam. When you download Stardew Valley for the first time, you will notice that the download size is slightly larger than the size of the game.
This happens because Steam will download your chosen Steam Proton version with this game as well. After the download is complete, simply click the "Play" button.
Your girlfriend Chisa Tsukiyama suddenly decides to leave to study overseas. Each lingering touch, each sharp intake of breath, each faint sting left behind becomes a quiet proof that you still exist to one another. You mark each other in your room, until the countdown reaches zero.
You have been with Chisa Tsukiyama for years. She is a gifted painter—her work captivating yet distant, much like herself. One day, without warning, Chisa tells you she is leaving to study overseas.
During the final five days, you silently agree not to speak of the future, only the present, as if nothing is ending. Every kiss, every claim on each other grows more intense than before. And Chisa —more yielding, more accepting—offers herself to you without resistance.

Exquisite artistic presentation
Full voice acting for the heroine, Chisa Tsukiyama
Rich interactive mechanics delivering a realistic interactive experience
Both first-person and third-person perspectives for a multi-angle immersive experience
Presented with Unity and Live2D, featuring Live2D characters across all scenes
High-definition visuals with full 4K support

Ultra-Immersive Interactive Experiences
Cling to these final five days together—the moments you look forward to most after every long day. Seize every chance to leave your presence etched into Chisa’s body.
Experience deeply immersive Live2D interactions, including head pats, intimate touches, caresses, teasing gestures, etc.—each movement rendered in vivid detail. As her affection level rises through your touch, new narrative paths unfold.
For now, Chisa will not turn you away.

Fully Voiced Heroine
All of Chisa's love are woven into her voice. Full voice acting delivers a raw and intimate experience. During conversations, you may choose responses based on your desires, and Chisa will respond to each one—softly, willingly, and honestly.
Name: Chisa Tsukiyama
Age: 23
Height: 164 cm
Figure: D cup
Birthday: January 13
Zodiac Sign: Aquarius
A slightly lazy and unkempt painter, Chisa spends her days smoking, drinking, and avoiding the outside world, instinctively sealing off her heart as a form of self-protection.
She is afraid of the future—afraid she cannot give you the promises you deserve—so she chooses to cut things off before being hurt you. Every serious conversation between you ends in physical closeness; it is both her way of loving you and her way of escaping.
During sex, she becomes extremely obedient—like a small cat desperate for its owner’s affection, clinging to touch as her only form of reassurance.