In 'Whose Hello?', you step into the life of a quirky private investigator in a bustling, retro-futuristic city where every voice has a secret. After receiving an enigmatic message telling you to find 'the real greeting,' you must navigate a labyrinth of bizarre characters, engaging dialogues, and unexpected twists that lead you deeper into a conspiracy involving a powerful communication company. Players must decipher clues hidden within conversations, unlock the true identities of the characters, and ultimately confront the mastermind behind the mystery in a race against time. Your choices shape the story, leading to multiple endings that reveal the intricacies of social connections and the truths hidden behind everyday greetings.