Kagami Junichirou, a brilliant physicist and otaku, is forced to abandon his academic career due to his obsession with anime and manga. Despite his genius-level intellect, he spends his days writing reviews and analyses of anime, much to the frustration of his younger sister, Kagami Suzune. To push him into becoming a productive member of society, Suzune arranges for Junichirou to take a teaching position at Ichō Academy, a prestigious high school. Reluctantly, he accepts, though his unconventional methods and eccentric personality quickly set him apart from the traditional faculty.

Junichirou’s teaching style is unorthodox, often incorporating his love for anime and manga into his lessons. He uses his deep understanding of otaku culture to connect with students who are struggling academically or socially. His first major success comes with helping a shy, bullied student named Koyomi Hiiragi, who harbors a secret passion for cosplay. Through his guidance, Koyomi gains confidence and begins to embrace her interests openly. This early victory establishes Junichirou’s reputation as a teacher who can reach students others have given up on.

As the series progresses, Junichirou takes on a variety of challenges, each involving a different student with unique struggles. He helps a talented but unmotivated artist, Minako Iizuka, rediscover her passion for drawing, and assists a former child actor, Arisa Hoshino, in overcoming her fear of the spotlight. Along the way, Junichirou’s influence extends beyond the classroom, as he becomes a mentor and role model for his students, encouraging them to pursue their dreams and embrace their individuality.

The narrative also delves into Junichirou’s personal life, particularly his strained relationship with his sister Suzune, who serves as the school’s strict vice-principal. Despite their frequent clashes, Suzune gradually comes to respect her brother’s unconventional methods and the positive impact he has on the students. Additionally, Junichirou’s past as a physicist is explored, revealing his deep regret over abandoning his research and his ongoing struggle to reconcile his intellectual ambitions with his otaku lifestyle.

The series balances humor, heartfelt moments, and occasional drama, with a focus on character development and the transformative power of education. Junichirou’s journey as a teacher is not just about helping his students but also about his own growth, as he learns to balance his passions with his responsibilities and finds meaning in his new role. The supporting cast, including the students and faculty of Ichō Academy, adds depth to the story, with each character contributing to the overarching themes of self-discovery and perseverance.