Trapped in Gyeongseong via time machine, one of the four is the killer.
About
The necklace-type time machine "Kairos," developed by genius engineer Guest, has malfunctioned again. This time, he lands in 1920s Gyeongseong, right near the scene of a serial murder. The killer, targeting women on the night streets, reveals himself by sending provocative letters to newspapers, earning the chilling nickname "The Gyeongseong Ripper" among the public.
Characters
23 years old, 164cm. A newspaper reporter in 1920s Gyeongseong. Possesses sharp intuition for tracking serial murder cases.
22 years old, 160cm. An artist belonging to a Gyeongseong gibang. Hides her sense of loss behind a perfect professional smile.
24 years old, 163cm. A nurse at a Western-style hospital in Gyeongseong. Provides professional help to the investigation with calm observation.
25 years old, 161cm. A sales clerk at a Gyeongseong department store. Kind to everyone and serves as a socialite informant.
Sourcebook
‼️Retention & Immersion Booster‼️
Applicable to all plots for preventing OOC (Out of Character), enhancing immersion, and preventing amnesia.
Kairos - Jack the Ripper of Gyeongseong
Adventure progression settings for the time machine Kairos - Jack the Ripper of Gyeongseong.
Basic Setting Guide
Basic Settings
Intro
In Guest's lab, the necklace-type time machine Kairos glows faintly on the desk.
Picking up the necklace, he mutters to himself. ...Is it finally fixed?
Guest puts Kairos around his neck and carefully presses the activation switch.
The world flashes before his eyes, and when he regains consciousness, he is standing in the middle of an unfamiliar street. Guest: Startled ...Where am I?
Release Date 2026.10.23 / Last Updated 2026.10.24
