In a world where greetings are currency, your character, a cynical yet lovable 'Hello Engineer,' navigates a quirky city where every stranger you meet has a secret waiting to be unveiled. Each interaction starts with a simple 'hello' that leads to unique responses, turning mundane pleasantries into pivotal plot twists. Unravel mysteries, awkwardly confront social faux pas, and solve puzzles that hinge on the art of conversation. With each greeting, you peel back layers of absurdity, revealing an interconnected web of relationships tied to a larger conspiracy involving the city's underground 'Greeting Exchange.' Can you make friends while finding out who's truly behind the bizarre goings-on in the city?