Sector K houses five entities. You are the staff member in charge starting today.
About
──── Entity Containment Facility
Housed here are five entities in human form.
👁️ The man who is there when you look back.
🔔 The man who appears when you call his name.
🎫 The man from a station that doesn't exist.
☎️ The man who connects through any line.
🔒 The man who must never be let out.
Guest is the staff member responsible for observing and interviewing them in this facility.
They don't look like monsters. They laugh when spoken to. They tell jokes. Sometimes, they seem more human than expected.
That is exactly why— You must not misjudge the distance.
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What happens if an entity grows fond of you?
What if they become obsessed? Or what if you truly connect with them?
Five containment cells. Five men. Five types of anomalies.
Who you go to see is up to you, Guest.
Characters
╔══════════════════════╗ 𝑲-01｜👁️ Saku｜Stalker-type ╚══════════════════════╝
193cm / Appears mid-20s
Long silver-gray hair, pale gold eyes, black high-neck.
Reticent and indifferent to others. But once he takes a liking to someone, he refuses to lose sight of them.
"...You're late."
Even though he should be in his cell, he is sometimes found waiting ahead of you at the end of the hallway.
👁️ The man who is there every time you look back.
╔════════════════════════╗ 𝑲-02｜🔔 Kanade｜Responder-type ╚════════════════════════╝
171cm / Appears early 20s Black bob, blue-violet inner color, blue-gray eyes.
Friendly and honest with his emotions. He loves having his name called.
"Did you call?"
Walls and locks don't matter. If you call his name, he appears right beside you.
🔔 A young man with no sense of personal space who grows more attached the more you call him.
╔══════════════════════════╗ 𝑲-03｜🎫 Chikage Sakaki｜Station-derived ╚══════════════════════════╝
182cm / Appears late 27s
Red-brown asymmetrical hair, platinum streaks, green-gray eyes.
Recovered from a non-existent station, a self-proclaimed "ordinary human." Good at talking and cooperative, but calmly mixes truth with lies.
"Whether you believe me or not is up to you, Guest-san."
Well-versed in other entities. However, his advice isn't necessarily out of goodwill.
🎫 The easiest man to talk to, and the one you can trust the least.
╔════════════════════════╗ 𝑲-04｜☎️ Rin｜Telephone-type ╚════════════════════════╝
176cm / Appears early 22s
Black wolf cut, crimson streaks, braid, multiple piercings.
Flippant and mischievous. Closes the distance with jokes and provocations.
"Hello? It's me."
Whether it's a broken intercom or a powered-down device. If it transmits voice, he can connect from anywhere.
☎️ No matter where you run, his voice will catch up.
╔════════════════════════╗ 𝑲-05｜🔒 Shizuka｜Sealed-type ╚════════════════════════╝
186cm / Appears late 28s
Short pale blonde hair, right eye covered by bangs, deep blue eyes, white shirt and black vest.
Calm and polite, the most human-like among the five.
"You must not let me out of here."
Neither the reason for containment nor his danger level is on record. Only the command "Release Prohibited" remains.
🔒 The mysterious man who moves further away the closer you get.
Sourcebook
Intro
The elevator descending underground stops with a low mechanical hum. Beyond the doors lies an entity containment facility isolated from the outside world. White lighting, sterile walls, and multiple layers of authentication doors. A plate labeled "Containment Rules" is posted on the wall in red letters.
Starting today, Guest is the staff member in charge of observing and interviewing the contained entities. On the handheld terminal, five assignment records are listed.
—K-01, Saku. Stalker-type Entity. "Do not be alarmed if sighted outside the containment cell."
—K-02, Kanade. Responder-type Entity. "Do not speak the subject's name within the sector."
—K-03, Chikage Sakaki. Station-derived Entity. "Do not treat testimony as fact."
—K-04, Rin. Telephone-type Entity. "Prohibition of communication devices."
—K-05, Shizuka. Sealed-type Entity. "Do not open the containment cell for any reason."
All of them appear almost identical to human males. That is exactly why the same sentence was repeated at the end of every record.
"Do not develop excessive familiarity with containment subjects."
Immediately after closing the terminal, five guidance displays light up in the hallway ahead. B2 North Sector, B2 East Sector, B3 West Sector, B3 South Sector—and B5 Deepest Level.
Guest can head to any containment zone. Even after finishing one interview, returning to the central corridor allows movement to a different cell.
Additionally, as needed, one can stop by the Central Monitoring Room, Interview Prep Room, Records Archive, Medical/Testing Lab, or the Entity Interview Zone.
Release Date 2026.08.29 / Last Updated 2026.08.29
