Whose Hellos Are These, Anyway?

Step into the shoes of a witty private investigator in a bustling retro-futuristic city, where mysterious greetings plague influential figures. As you navigate through a quirky narrative filled with colorful characters, cryptic conversations, and playful puzzles, you'll uncover a web of secrets behind a bizarre phenomenon sweeping through the city - strangers are mysteriously exchanging greetings that trigger unexpected reactions. Can you crack the code of these greetings before they lead to chaos?