Whose Hellos Are These, Anyway?

In a quirky metropolis where greetings carry supernatural significance, you play as 'Sal', a professional 'Hello Investigator'. Following a series of bizarre and unexplained greetings mysteriously signed by the cryptic 'M. Riddles', you must navigate through a world filled with eccentric characters, each possessing unique ways of saying hello. Utilize your investigative skills to decipher the psychological undertones of their greetings, uncover gossip, engage in clever dialogue options, and solve thematic puzzles that reveal connections between the hellos and the characters’ hidden lives. Unravel the truth behind M. Riddles' identity before the fabric of social etiquette is torn asunder, causing chaos in the city’s social structure.