In a world where social greetings are mysteriously disappearing, you play as a quirky private investigator called in to solve the bizarre case. Players explore vibrant city neighborhoods, each with their own unique culture of greetings, and meet a cast of eccentric characters who each have their own secretive reasons for wanting to keep their hellos hidden. As you gather clues through witty dialogue and clever choices, you must navigate the web of secrecy, uncover the bizarre reasons behind the vanishing greetings, and restore the art of hellos to the city before the final deadline—a grand 'Hello Festival' at the end of the week.