In a world where emotions are tangible and can be traded, you play as an 'Emotion Merchant' responsible for selling hearts, which contain the essence of various feelings. Your shop has just received a unique shipment of powerful hearts that once belonged to notorious figures—each with their own mysterious backstory and emotional quirks. One day, a heart goes missing, and a chaotic chain of events unfolds as customers turn into overwhelming versions of their emotions. You must navigate the bizarre city of Etherealis, gathering clues, leveraging character feelings, and deciding who can handle which heart. Your choices will affect the manifestations of emotions in townsfolk, and ultimately lead you to the heart-thief, while revealing the deeper connections between you and the residents. Can you restore balance and uncover the secret behind emotions' values before the city erupts in chaos?