Whose Hellos Are These, Anyway?

You are a quirky private investigator in a bustling, eccentric city where everyone greets each other in exaggerated ways. One day, you receive a mysterious set of voice messages filled with peculiar 'hellos' from various residents. Intrigued, you set off on a humorous quest to uncover the origins of these greetings while interacting with a cast of colorful characters – from an overly dramatic barista to a conspiracy theorist librarian. Solve puzzles, engage in witty banter, and piece together the strange story behind the city's odd tradition, all while trying to find the sender before the city’s annual ‘Hello Festival’ exposes everything.