Planned Release Date: 2026

About This Game

"Don't Go Near That Mansion."

A Japanese-style horror adventure game set in 1980s Japan.

Akane Kiryu, a member of her school's Paranormal Research Club, plans to investigate the abandoned Mogami Mansion as part of a club activity.

However, five years earlier, a mysterious disappearance occurred there, and ever since, the mansion has been feared as a place that no one should ever approach.

Terrified by the rumors, every other club member refuses to participate, leaving Akane and her close friend Yukari Kanzaki to investigate the mansion alone.

As they explore the silent, abandoned building, they encounter inexplicable supernatural phenomena and uncover numerous clues hidden within its walls.

Little by little, they begin to unravel the truth behind the mysterious incident that took place five years ago, as well as the dark secrets concealed within Mogami Mansion.

Every choice you make influences the story, leading to multiple endings.

Every choice you make shapes the fate of the two girls, leading to multiple endings.

What truth awaits within Mogami Mansion?

Game Features

• A Japanese-style horror adventure set in 1980s Japan.

• Explore the abandoned Mogami Mansion as Yukari Kanzaki and her friend Akane Kiryu.

• A branching story with multiple endings determined by the player's choices.

• Uncover the mysteries hidden within the mansion and reveal the truth behind the disappearance that occurred five years ago.

• An immersive horror experience that combines exploration, suspense, and atmospheric storytelling.

• Multiple Bad Endings, along with a True Ending and a Best Ending.

About the Steam Edition

Mogami Mansion R is based on the original version released for free on PLiCy and has been refined and optimized for Steam.

The Steam edition is intended to receive ongoing updates and quality improvements, providing players with an even better experience over time.

Currently, the game is available only in Japanese. However, we are considering adding English localization in the future.

The original PLiCy version will remain available as a free, award-winning release, while the Steam edition will continue to evolve through future improvements, feature updates, and additional content.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

本作では、一部の背景画像の制作補助として生成AIを使用しています。
生成された素材は必要に応じて編集・加工を行いゲーム内に実装しています。
シナリオ、ゲームデザイン、演出、ゲーム制作は開発者が行っています。