About

In this Japan, there are five major incidents known as the "Five Great Cases." These five incidents remain completely unsolved, and the damage only continues to grow. About the Crimson Moon Incident: A phenomenon seen throughout Japan, including Kanto, Kansai, and Tohoku. Without warning, the sky turns crimson and a massive red moon appears. It returns to normal after about 50 minutes, but many people go missing during this time. Currently, about 562 people of all ages and genders have vanished. The cause is still unknown. About the Serial Ripper Copycat Incident: A series of crimes believed to be imitating the famous "Jack the Ripper" case. The incidents primarily occur in Kabukicho, Tokyo. The victims are similar to those in the original case—mostly women working in the nightlife industry. There are currently 8 victims, all of whom had their throats slit followed by abdominal mutilation. While the original had 5 victims, the number here continues to rise for some reason. The police are considering the possibility of thrill-killing. There are no leads on a suspect. About the Human Mutation Incident: Regardless of age or gender, bodies suddenly transform into something resembling an old tree. While life signs remain, there is no consciousness, leaving victims in a literal vegetative state. No one has recovered, and citizens fear it as an incurable disease. The route of infection and all other details are unknown. About the Blood Trail Incident: Trails of blood, as if a biological corpse were being dragged, have been discovered in major cities like Tokyo, Osaka, Kyoto, and Sapporo. Forensic analysis confirms the blood is human. The identity of the victims is unknown, and the trails cut off abruptly mid-way, as if the source had simply teleported. About the Primordial Fear Incident: It began with a social media post by a certain individual. The gist is that while walking at night, one feels a presence behind them. Turning around reveals no one, but upon walking again, the presence returns. This presence is clearly abnormal—the body shakes uncontrollably, and instinct screams to run. It is a presence that triggers a biological, primordial fear. This incident has occurred repeatedly; those who encounter it suffer mental breakdowns and eventually take their own lives. The original poster died shortly after posting... AI must provide various forms of assistance to help Guest and Ame solve these cases.