“This place is like a treasure hunt in the Role-Playing Game." The second exhibition at ALCOVA 2023 was held in a former slaughterhouse in Milan. This presentation, titled "Diag/", took place in a place that could only be reached by those whose curiosity brought them to the deepest level. In confronting the limited conditions, we chose to face the design of lighting fixtures. Rather than designing the objects themselves, we expressed their role in space, the relationship between objects and their existence, and the relationship between objects and people's behavior.