Since the 2020s, Korean society is facing the crisis of “regional extinction,” a rapid population decline and the loss of residential functionality in rural areas. As the crisis is a macro-scale social phenomenon, the role of architecture is to mitigate its negative impact and provide spatial opportunities for the impacted areas to retain residential functionality. With two main assumptions, that the concept of “residential population” urges rural areas to become attractive places that address higher-order needs that cannot be met in urban areas, and that while shared housing facilities can leverage the strengths of rural areas, they are also vulnerable to their weaknesses, they should therefore be developed into mobile shared housing, this study reinterprets the concept of “living population,” a recently emerging strategic response to the problem, into “mobile shared housing.” We examine the results of this approach in architectural education and provide directions for future improvement with the main findings of this study being as follows: First, mobile shared housing can be implemented using the plug-in architecture concept, with the curriculum presented in this study successfully facilitated the acquisition of this concept in architectural education. Second, however, due to a lack of a foundational knowledge in humanities, the curriculum revealed limitations on realizing the ultimate intentions of mobile shared housing, thus requiring further refinements in the curriculum.