"Family Affair" centers on the lives of the Aizawa family, a seemingly ordinary household that harbors complex dynamics and hidden secrets. The patriarch, Hiroshi Aizawa, is a stoic businessman whose work often keeps him distant from his family. His wife, Yumi, struggles to maintain harmony at home while grappling with her own unresolved past. Their two children, teenage daughter Akari and younger son Haruto, navigate the challenges of adolescence and familial expectations, each dealing with their own personal struggles.

The narrative unfolds as a series of interconnected events that reveal the family’s underlying tensions. Akari, a high school student, becomes entangled in a love triangle involving her childhood friend, Riku, and a mysterious transfer student, Sora. Her emotional turmoil mirrors the growing disconnect between her parents, whose marriage begins to unravel under the weight of unspoken grievances. Meanwhile, Haruto, a quiet and introverted middle schooler, finds solace in his friendship with a classmate, Mio, who helps him confront his feelings of isolation and self-doubt.

As the story progresses, long-buried secrets come to light, including Yumi’s past relationship with a man who unexpectedly reenters her life, and Hiroshi’s involvement in a corporate scandal that threatens to upend their family’s stability. These revelations force each member of the Aizawa family to confront their own flaws and insecurities, ultimately leading to moments of growth and reconciliation.

The series explores themes of love, betrayal, and the complexities of familial relationships, weaving together multiple perspectives to create a nuanced portrayal of the Aizawa family’s journey. Through its intricate character dynamics and emotionally charged plotlines, "Family Affair" offers a compelling examination of the challenges and triumphs that define family life.