Whose Hellos Are These, Anyway?

You wake up in a peculiar town where no one seems to know your name, but every resident insists on greeting you with an inexplicably warm 'hello!' Shortly after your arrival, locals begin disappearing one by one, each last being spotted with a curious grin and a mysterious note in hand. As you navigate through quirky shops, strange traditions, and eccentric characters, you'll piece together the otherworldly connection binding these hellos. Can you solve the riddle of this bizarre society before the next hello is directed at you?