Everyone needs a psychological “safe base.” It does not have to be a physical space, but rather a mental structure that helps one maintain inner stability and self-integration when facing external pressure and uncertainty.

The rooftop add-on structures in Taiwan embody this psychological need, reflecting a desire for privacy and autonomy, as well as a cultural concern for psychological boundaries and belonging. secret base gathers various secret bases and presents, through a visual journal, the connection between these spaces and the emotional needs they sustain.