In a world where hearts can be exchanged like currency, players assume the role of Kira, a heart collector with a mysterious past and an unrivaled ability to read emotions. As Kira navigates the bustling city of Emotropolis, she encounters various characters—each with their own hearts to sell or hide. Players must choose dialogue paths, solve emotional puzzles, and forge alliances (or betrayals) to uncover the truth about Kira's own heart and the organization that seeks to control it. Every choice shapes not only Kira's fate but the fate of the city itself, leading to multiple endings based on emotional connections and personal sacrifices.