"Sakamoto desu ga?" centers on Sakamoto, a high school student whose unparalleled coolness and perfection make him the center of attention at his school. From the moment he transfers in, Sakamoto effortlessly excels in every situation, whether it be academics, sports, or social interactions. His calm demeanor, sharp wit, and ability to turn even the most mundane tasks into extraordinary feats captivate both his classmates and teachers. Despite his overwhelming popularity, Sakamoto remains humble and enigmatic, never seeking recognition for his actions.

The series unfolds through a series of episodic vignettes, each highlighting Sakamoto's ability to navigate and resolve various challenges with ease. Whether facing bullies, rival students, or everyday school dilemmas, Sakamoto employs creative and often absurd solutions that leave everyone in awe. For instance, he outsmarts a group of delinquents by using a swarm of bees to his advantage or transforms a mundane cleaning task into a performance art piece. His actions often have unintended but positive consequences, such as inspiring his peers to improve themselves or fostering unexpected friendships.

Supporting characters include classmates who either admire or envy Sakamoto's abilities. Kubota, a quiet and observant student, often narrates Sakamoto's exploits, while others like Sera, a popular girl, and Atsushi, a delinquent, find themselves drawn to his charisma. Even those who initially resent Sakamoto, such as the jealous and scheming Fukase, are eventually won over by his kindness and ingenuity. The series maintains a lighthearted and comedic tone, with Sakamoto's over-the-top antics serving as the primary source of humor.

Throughout the series, Sakamoto's true motivations and background remain shrouded in mystery, adding to his allure. His actions, while seemingly effortless, often reveal a deeper understanding of human nature and a genuine desire to help others. The narrative concludes with Sakamoto's departure from the school, leaving behind a legacy of inspiration and a lasting impact on those who knew him. The series blends humor, absurdity, and subtle life lessons, making it a unique and memorable addition to the slice-of-life genre.