Who Spoke the Hello?

In a bustling city where the mundane mixes unpredictably with the extraordinary, you play as a world-weary detective known for solving the oddest of cases. The latest enigma? A string of bizarre greetings—everyone seems to be saying 'hello' in a secretive and peculiar manner, but only one of them is uttering something sinister. As you interact with quirky characters, decipher cryptic clues, and navigate through a tapestry of miscommunication and unexpected revelations, you must uncover who is behind this peculiar greeting and the chaotic events that follow. Will you solve the mystery before it spirals out of control?