Anna Kazushima, a responsible adult with a slight workaholic tendency, struggles to shake off her childish behaviors like monitoring her brother's diet and sharing a futon with him. Her brother Aito is left bewildered by their unconventional cohabitation, which hinders his usual methods of stress relief. Despite their peculiar dynamic, Anna remains oblivious to Aito's needs, creating a unique family dynamic. In a separate tale, the Shiina twins, scarred by their past experiences with teachers, find solace and healing through the compassionate support of those around them, ultimately shedding their disdain for educators as they navigate their roles in 'Okujou no Fuukei'.