In 'Hello, Whose Hello?', you assume the role of an undercover librarian who stumbles into a bizarre world of misplaced greetings and mysterious phrases. Set in a whimsical metropolis where every citizen has their unique way of saying 'hello', players must unravel the source of a widespread 'greeting contagion' that causes chaos in social interactions. Navigate through quirky neighborhoods, interact with eccentric characters, and solve hilarious puzzles that involve wordplay and riddles. Your choices will affect the unfolding drama as you uncover a conspiracy that challenges the very art of conversation itself.