In 'Whose Hello?', you play as an eccentric detective who specializes in resolving bizarre cases by decoding the strange greetings of people around the world. After receiving a cryptic letter signed only with a cryptic 'Hello', you embark on a transcontinental journey where each encounter offers a new set of greetings that hold the key to solving the overarching mystery. Navigate quirky characters, unravel a hidden conspiracy, and fill your detective notebook with notes of absurd and hilarious interactions while trying to figure out who sent the letter and why.