In 'Hello, Whose Hello?', players assume the role of a quirky anthropomorphic detective in a bizarre realm where communication has been disrupted. The inhabitants, a colorful array of creatures, have lost the ability to greet each other properly, leading to chaos and confusion. The protagonist must embark on a journey through various eccentric locations—like the awkward Silence Forest and the rambunctious Rhyme City—solving riddles, unraveling secrets, and piecing together the mystery of the stolen greetings. Throughout the adventure, players will interact with zany characters and navigate choices that affect the outcome of their investigation, all while unleashing their inner detective in a world where every 'hello' holds the key to the plot's resolution.