Whose Hello?

In a bustling city governed by a set of unusual social contracts, the citizens communicate through peculiar greetings. One day, you receive an anonymous message featuring a single word: 'Hello.' However, this isn't just any 'Hello'; it's a challenge to uncover the identity of the sender amid a web of secret alliances and hidden motivations. As you journey through the city, interacting with its quirky inhabitants, solving riddles, and making morally ambiguous choices, you must determine not only who sent the 'Hello' but also why it threatens to unravel the delicate balance of your society. Each interaction could reveal crucial clues or lead you astray, making your decisions critical in piecing together the truth. Can you navigate this tangled social landscape before time runs out?