I was transferred to a city called "Silent Town", where crime does not follow any human logic, but strictly abides by various weird "rules". For example: "Whoever opens the door for a stranger after twelve o'clock at midnight will die.", "Whoever drops a coin in the wishing fountain and looks back, will die.", "Whoever recites a specific nursery rhyme in the old town will die."... These rules are like urban legends, but they actually harvest life. As the newly appointed "Rules Enforcement Officer", my job is to crack the loopholes in these murder rules and find the people, or... "Things" who use the rules to kill people. Here, forensic science and logical reasoning are almost ineffective. If you want to solve the case, you must test the boundaries of the rules yourself and find the "question maker" hidden behind the rules without triggering death conditions. As I cracked more and more rules, I discovered that the entire city was a huge, running "killing game," and the source of all the rules pointed to the taboo center of the city—a long-abandoned amusement park.
