"Do You Know the MILFing Man?" is a comedic slice-of-life anime that centers around the daily life of a middle-aged man named Hiroshi Tanaka, who unexpectedly becomes a local celebrity after a viral video of him performing a mundane task with an unusual level of enthusiasm earns him the nickname "The MILFing Man." The term "MILFing" in this context is a playful, nonsensical catchphrase coined by the internet, unrelated to its colloquial meaning, and serves as a running gag throughout the series.

Hiroshi, a mild-mannered office worker, struggles to adapt to his newfound fame while maintaining his ordinary life. His interactions with his quirky coworkers, his overbearing but well-meaning wife, Yumi, and his teenage daughter, Aiko, who is both embarrassed and secretly proud of her father's antics, form the core of the narrative. The series explores themes of family dynamics, societal expectations, and the absurdity of internet culture, all while maintaining a lighthearted tone.

The plot unfolds episodically, with each episode focusing on a new challenge or situation arising from Hiroshi's fame. These include awkward encounters with fans, attempts to capitalize on his popularity for career advancement, and the occasional misadventure caused by his well-intentioned but clumsy nature. Supporting characters, such as Hiroshi's eccentric boss, Mr. Saito, and his best friend, Kenji, a fellow office worker who often finds himself dragged into Hiroshi's schemes, add depth and humor to the story.

The anime balances its comedic elements with moments of genuine warmth, particularly in its portrayal of Hiroshi's relationships with his family. Yumi, despite her exasperation with Hiroshi's antics, consistently supports him, while Aiko's evolving perspective on her father's fame reflects the generational gap and the complexities of modern identity. The series concludes with Hiroshi learning to embrace his unique position, finding a balance between his ordinary life and his unexpected role as a local icon.