The psychologist Ryou and his cheerful nurse Asuna explain many aspects of mental illness to the reader. They cover topics such as the validity, prevalence, and origins of mental disorders, in addition to addressing specific disorders. The information is imparted in a cheerful and comic manner, with various jokes, puns, and pop culture references.

The Z Project was intended to give the new generation a break from caring for the old. The original intenion was to create a machine to care for them without any intervention. At first glance, it looked like an excellent plan, and many of the younger generation approved of its application. But when old Mr. Takazawa become the test subject for the Z