Hyouga Poyota is a lively 5-year-old boy and the eldest child in his family, navigating the oldest class at preschool. His daily life unfolds alongside his 3-year-old sister Jura, who attends the youngest preschool class. Their parents, Miki Poyota—a housewife and picture book author—and Gendai Poyota—a salaryman affectionately called "Darling" by Miki—anchor their household. The series captures this family's relatable adventures in raising young children, centering on Hyouga amid parenting moments. The title's "poyopoyo" reflects toddlers' endearing unsteady steps, embodying Hyouga and Jura's authentic developmental quirks.