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Daily-erosion-style ADV "Human Calendar Archive" released today. With a physical calendar now in hand, aim to save the girl who dies at the end of summer.

Note: the original Japanese article can be found at:
https://www.4gamer.net/games/991/G999111/20251016018/

Editorial Department: Akasaka | 2025/10/16 04:07 (UTC)

Fourth Realm is releasing the archival version of its real-world immersive adventure game “The Human Calendar Archive” today (October 16, 2025) at 18:00. The current price is ¥3,800 (tax included), but it will increase to ¥4,400 (tax included) starting October 23.

Thumbnail image No.009 / Real-world immersive ADV “The Human Calendar Archive” released today. Receive a physical calendar and aim to save a girl who dies at the end of summer

This title is an archival version of the real-time ARG (Alternate Reality Game) “The Human Calendar”, which was serialized online from April to August (related article). Players receive a physical calendar with scheduled entries and work toward saving a girl who is destined to die at the end of summer.

Thumbnail image No.010 / Real-world immersive ADV “The Human Calendar Archive” released today. Receive a physical calendar and aim to save a girl who dies at the end of summer

Players advance the game by actually exploring websites and exchanging emails with characters. While the original version updated its web content gradually according to real-time progression, the archival version updates based on the player’s own pace.

Thumbnail image No.011 / Real-world immersive ADV “The Human Calendar Archive” released today. Receive a physical calendar and aim to save a girl who dies at the end of summer

Purchase Page for “The Human Calendar”

Aim to save a girl who dies at the end of summer
“The Human Calendar Archive” is now available

The story begins in April and unfolds day by day until August 31, when death arrives.
A daily-paced real-world immersive adventure game.

Thumbnail image No.001 / Real-world immersive ADV “The Human Calendar Archive” released today. Receive a physical calendar and aim to save a girl who dies at the end of summer

Fourth Realm announces today, October 16 at 18:00, the release of “The Human Calendar Archive,” an archival version of its real-world immersive adventure game “The Human Calendar.” The studio behind titles such as The Human Wallet and Kagami’s Special Juvenile Rehabilitation Facility brings this unique experience to life.

“The Human Calendar” is an adventure game where players aim to save a girl who dies at the end of summer. A physical calendar with scheduled entries will be delivered directly to your hands.

Thumbnail image No.002 / Real-world immersive ADV “The Human Calendar Archive” released today. Receive a physical calendar and aim to save a girl who dies at the end of summer Thumbnail image No.004 / Real-world immersive ADV “The Human Calendar Archive” released today. Receive a physical calendar and aim to save a girl who dies at the end of summer

Unlike traditional adventure games, players explore real blogs and school websites, communicate with in-game characters via email, gradually uncovering secrets about the remote island where she lives—and ultimately her fate.

Thumbnail image No.005 / Real-world immersive ADV “The Human Calendar Archive” released today. Receive a physical calendar and aim to save a girl who dies at the end of summer

Additionally, “The Human Calendar” was uniquely structured as a real-time ARG that unfolded online day by day from April to late August. It attracted over 150,000 viewers.

On the fateful date of August 31, multiple keywords trended on X (formerly Twitter), reflecting widespread public attention toward its conclusion.

Thumbnail image No.007 / Real-world immersive ADV “The Human Calendar Archive” released today. Receive a physical calendar and aim to save a girl who dies at the end of summer

Now, “The Human Calendar Archive” restructures this real-time narrative into an archival format. The estimated playtime is approximately 4 to 6 hours.

Thumbnail image No.006 / Real-world immersive ADV “The Human Calendar Archive” released today. Receive a physical calendar and aim to save a girl who dies at the end of summer

In this archival version, Fourth Realm’s proprietary system “BPS” ensures that real-world websites—such as character blogs—are dynamically updated based on the player’s progress. Emails arrive in real time, and fictional social media platforms are refreshed accordingly, offering a brand-new experience enabling players to relive the story from beginning to end.

Thus, this title can truly be considered Fourth Realm’s latest masterpiece.

Thumbnail image No.003 / Real-world immersive ADV “The Human Calendar Archive” released today. Receive a physical calendar and aim to save a girl who dies at the end of summer

Note that “The Human Calendar Archive” does not require any specific gaming device or app—it runs on your PC or smartphone browser. To play, you must purchase the physical calendar titled The Human Calendar (a real calendar with scheduled entries) through Fourth Realm’s online store or bookshops.

Currently priced at ¥3,800 (tax included), we will raise the price to ¥4,400 (tax included) starting October 23, factoring in pricing and experience balance.

We sincerely hope you’ll purchase before this change takes effect.

■ Fourth Realm
Fourth Realm is a creative collective that crafts stories in the ambiguous space between reality and fiction.