"Oh! Family" centers on the daily lives and interactions of the quirky yet endearing members of the Tachibana family. The series explores their humorous and heartwarming experiences as they navigate the challenges of modern family life. The family consists of the hardworking but often clueless father, Kenta Tachibana; the resourceful and patient mother, Yoko Tachibana; their mischievous and energetic son, Taro; and their precocious and imaginative daughter, Hanako. Each episode delves into relatable family scenarios, such as school events, household chores, and neighborhood adventures, often highlighting the generational and personality clashes between the parents and children.

The narrative frequently emphasizes the importance of communication and understanding within the family unit. Kenta’s attempts to connect with his children often lead to comedic misunderstandings, while Yoko serves as the stabilizing force, mediating conflicts with wisdom and humor. Taro’s antics and Hanako’s creative schemes drive much of the episodic humor, showcasing their distinct personalities and the dynamics of sibling rivalry. The series also introduces recurring side characters, such as the nosy but well-meaning neighbor, Mrs. Tanaka, and Taro’s best friend, Kenji, who add depth to the family’s interactions with the outside world.

Themes of love, resilience, and the value of family bonds are woven throughout the series, often culminating in moments of heartfelt resolution. While the tone is predominantly lighthearted, the show occasionally touches on more serious topics, such as financial struggles or the pressures of parenting, providing a balanced portrayal of family life. The episodic structure allows for a variety of self-contained stories, each contributing to the overarching depiction of the Tachibana family’s growth and unity. The series avoids heavy drama, instead focusing on the small, everyday triumphs and challenges that define their relationships.