An incubus prince escaped the Dark Lord to become a human corporate drone. But when the Dark Lord himself flees to Earth and crashes in his apartment, what’s a runaway prince to do?

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Coming Soon To Early Access

The developers of this game intend to release as a work in progress, developing with the feedback of players.

Note: Games in Early Access are not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“The game is currently in active development, and we want to involve players before the full release.
We think that working closely with the fans is the best way to make this game the best it can be. Early Access allows us to share our progress, gather feedback on the story and gameplay, and fix bugs alongside our players to ensure the final version reaches its full potential.”

Approximately how long will this game be in Early Access?

“Rather than committing to a fixed date, we prefer to focus on ensuring all major content is implemented, balanced, and polished, releasing the full version only when it meets our quality standards.
We estimate the game will remain in Early Access for approximately one to two years. ”

How is the full version planned to differ from the Early Access version?

“We plan to expand the game significantly throughout Early Access by introducing new characters, additional story content, and more ways for players to interact with the world.

One of the major features we plan to add is a story-based gacha system that allows players to unlock new roommates through gameplay. We also plan to introduce a life-simulation day cycle with randomly selected events, creating more variety and replayability between playthroughs.

Our goal is for the full version to offer substantially more content, character interactions, events, and gameplay systems than the Early Access release, while continuing to refine and improve existing features based on community feedback.”

What is the current state of the Early Access version?

“The Early Access version features the complete first episode of the game. All features, mechanics, and content currently implemented are listed in the 'About This Game' section below.”

Will the game be priced differently during and after Early Access?

“The base game will always be free for everyone! Our intention is for the game to remain free both during Early Access and after the full release.

In the future, we may explore optional paid DLCs or other ways to support the development, but the core game is planned to remain available at no cost.

How are you planning on involving the Community in your development process?

“We plan to gather suggestions, bug reports, and general feedback through our Discord server and other community channels.

We'll be paying close attention to what players enjoy, what they feel could be improved, and which features they'd like to see expanded. While not every suggestion can be implemented, we intend to use community feedback to help guide future updates and improve the overall experience.

If you'd like to help shape the game's future, we'd love to hear your thoughts and ideas.
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Mature Content Description

The developers describe the content like this:

This game is not suitable to anyone under the age of 18 due to is containing adult topics, erotic and sexual scenes.

About This Game

​King-Sized Roommate is a comedy NSFW visual novel packed with memorable characters from different realities for you to meet and get to know intimately~

When your home world is under threat, defying the almighty Lord of Darkness takes colossal courage. You have to summon all your wits, map out a strategy, weigh hundreds of options for victory, and... finally, realizing just how bad things are, flee to another dimension to become a corporate drone in Japan under a human guise.

Oddly specific? Well, that is exactly what Prince Reinard did. An incubus from the monster realm, he now goes by the name Kisaragi Rei and blends right in with humans.

Three years have passed since his great escape. Life is miserably boring, but at least it is peaceful and safe... Right up until the moment that very same Lord of Darkness teleports into this world using the exact same method. He calls himself Obsidian, the King of Monsters. His presence is terrifying, and his towering frame literally hits the ceiling of Rei's tiny studio apartment.

Meet the Main Characters!

A short beginning of the story of this visual novel featuring the opening act of the plot and the first tastes of Rei and Obsidian living together.

Grow Closer!

Every choice you make influences your relationships and twists the upcoming story.

Early Access

The game is going to grow SIGNIFICANTLY. Get ready for a massive story expansion and unique gameplay mechanics.

We are actively working on the project, but the game will always remain 100% free for everyone.

System Requirements

Windows
SteamOS + Linux
    Minimum:
    • OS: Windows 10 (64-bit)
    • Processor: Intel Core i3-2100 / AMD Athlon II X4 640
    • Memory: 4 GB RAM
    • Graphics: NVIDIA GeForce GT 730 / AMD Radeon R7 240
    • DirectX: Version 11
    • Storage: 2 GB available space
    • Sound Card: Compatible with DirectX
    Recommended:
    • OS: Windows 10 / 11 (64-bit)
    • Processor: Intel Core i5-3470 / AMD FX-4300
    • Memory: 8 GB RAM
    • Graphics: NVIDIA GeForce GTX 750 / AMD Radeon R7 260X
    • DirectX: Version 11
    • Storage: 2 GB available space
    • Sound Card: Compatible with DirectX
    Minimum:
    • OS: Ubuntu 20.04 LTS / SteamOS 3.0
    • Processor: Intel Core i3-2100 / AMD Athlon II X4 640
    • Memory: 4 GB RAM
    • Graphics: NVIDIA GeForce GT 730 / AMD Radeon R7 240
    • Storage: 2 GB available space
    • Sound Card: Compatible with DirectX
    Recommended:
    • OS: Ubuntu 22.04 LTS / SteamOS 3.0
    • Processor: Intel Core i5-3470 / AMD FX-4300
    • Memory: 8 GB RAM
    • Graphics: NVIDIA GeForce GTX 750 / AMD Radeon R7 260X
    • Storage: 2 GB available space
    • Sound Card: Compatible with DirectX
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