Dive into the chaotic urban world of a professional 'Hello' investigator, tasked with deciphering the strange messages and greetings left behind by a rogue acquaintance. Navigate through a web of quirky characters, each with their own peculiar hellos that reveal clues about a larger mystery. Travel across bustling city streets, eccentric cafes, and underground hideouts as you piece together the puzzle of who is behind the bizarre hellos—and why they make it their mission to confuse the city's residents. Your choices will shape the narrative, leading to multiple endings based on your sleuthing skills and social interactions.