Step into the shoes of an underwhelming private investigator in a city where every greeting could be a clue and every hello holds secrets. You have just received an anonymous call to investigate a peculiar phenomenon: every citizen has suddenly forgotten the basic concept of greetings. No one knows how to say 'hello' anymore, leading to misunderstandings, comic confrontations, and a series of dramatic events. Solve riddles, unravel the mystery behind this bizarre epidemic, and interact with outlandish characters who all have their own theories about who or what is behind the madness. Every choice you make affects the outcome of your investigation and the fate of the city’s social interactions.