After injuring his back and getting a slipped disk, Hiroshi is whisked away to an Este salon by a mysterious girl for a free beauty treatment and massage. To his shock, he returns home transformed into a robot. While Shinnosuke is thrilled, Misae is understandably concerned by the unusual sight. The robot version of Hiroshi proves to be incredibly handy, able to be controlled via a remote to perform various tasks like cooking and cleaning. As Hiroshi unravels the mystery behind his robotic transformation, he discovers a sinister plot orchestrated by the 'Association of Fathers' to create ideal father figures across Japan. Chaos ensues as fathers all over the country lose control, causing turmoil in Kasukabe and the Nohara family. As the city teeters on the brink of collapse, Shinnosuke and Robot Dad Hiroshi rise to the occasion to restore order. In a showdown of middle-aged men, this tale weaves a poignant narrative that tugs at the heartstrings of fathers and families nationwide, evoking both tears and triumph.