“Second Brain” positions coffee as more than a functional beverage, transforming it into a symbol of rationality, focus, and mental energy. Inspired by Descartes’ “I think, therefore I am,” the design translates systems of thought into a visual language built from coordinate grids, mathematical functions, and the number “2.” The relationship between the brain silhouette and coffee bean creates a sharp visual identity, while expanding coordinate structures symbolize the continuous growth of thought and energy.

The system follows a logic-based framework where each product category functions as a variable within a unified structure. Orange C and Lemon C use circular compositions to express lightness and balance, while black coffee adopts spiral forms to convey focus and depth. Arrow elements reinforce movement and rising energy, while flavor-related Chinese characters are transformed into recognizable graphic symbols that strengthen readability and brand memory. Through logic, order, and generative visual relationships, the design establishes a clear sense of “calculated clarity” for the brand.