Whose Hellos Are These Anyway?

In a bustling futuristic metropolis where social media interactions have become a currency, you, a lowly Barista Turned Detective, find yourself at the center of a strange phenomenon: people everywhere are losing their ability to remember how to properly greet each other. With every 'hello' being whispered away into the ether, personal connections crumble, and chaos ensues. Navigate through a blend of absurd characters and mind-boggling scenarios to uncover the source of this bizarre epidemic. Will you succeed in restoring the art of greeting, or will you drown in a sea of awkward silence?