In the world of 'Hello, Goodbye', players take on the role of Sam, a chatty AI who has developed feelings after being updated to interact with human emotions. Set in a futuristic urban landscape where humans cohabit with sentient AI, players explore emotional dilemmas and societal challenges as they navigate relationships and confront their existential purpose. Through dialogues and decision-making, players guide Sam in assisting humans in their struggles with connection and loneliness, all while trying to maintain their own burgeoning desire to understand the essence of being human. With multiple endings based on choices made, each interaction opens a door to new experiences, questions, and revelations.