Whose Hellos Are These Anyway?

In a bustling metropolis where social interactions are more complex than ever, you assume the role of a quirky private investigator known for solving absurd mysteries. One day, you stumble upon an unusual case: a bizarre phenomenon where every 'hello' in the city suddenly starts coming with unexpected consequences! People are losing their identities, forgetting their friends, or even accidentally becoming celebrities—all triggered by a seemingly harmless greeting. As you navigate the eccentric characters and their ludicrous situations, each choice you make leads you deeper into a web of humorous conspiracies. Your task is to deduce the source of these chaotic greetings before they plunge the city into a state of total social anarchy!