Musuko ga Osewa ni Nattemasu!

Shinji is a highly successful, elite salaryman navigating the demanding challenges of single fatherhood. Driven by an unrelenting desire for perfection in every aspect of his life, he holds exceptionally high standards, particularly when it comes to his son's education and well-being. Because of this rigid mindset, Shinji immediately clashes with Sakihara, his son's homeroom teacher. Rather than viewing him as a dedicated educator, Shinji dismisses Sakihara as nothing more than a flashy, irresponsible youngster who lacks the maturity to properly guide children. Determined to ensure his son receives the best possible environment, Shinji repeatedly confronts the teacher over various grievances. His intense and uncompromising behavior quickly earns him a reputation among the school staff, leading many to label him a notorious monster parent. Yet, despite his relentless criticisms and constant interference, an unexpected shift occurs in their contentious dynamic. Instead of pushing back against the overbearing father, Sakihara surprises everyone by stepping up in a deeply personal way, ultimately taking it upon himself to intimately care for Shinji's son. This unforeseen development forces the perfectionist salaryman to completely reevaluate his harsh judgment of the young teacher, setting the stage for a complicated and evolving relationship between the two men.