"Ronowe Sensei no Akuma na Kami Jugyō" centers on Ronowe, a demon who serves as a teacher at a prestigious magic academy. The academy, located in a world where humans and demons coexist, educates students in both magical and demonic arts. Ronowe, despite his intimidating appearance and reputation as a fearsome demon, is a dedicated and unconventional educator. His teaching methods often involve unorthodox and morally ambiguous techniques, which challenge his students to think critically and push their limits.

The narrative unfolds through the interactions between Ronowe and his diverse group of students, each with unique backgrounds and abilities. Among them is Lilia, a talented but insecure human mage struggling to prove herself in a predominantly demonic environment. Another key student is Garm, a demon with immense physical strength but a lack of control over his powers. The dynamics between Ronowe and his students form the core of the story, as he guides them through rigorous training, dangerous missions, and personal growth.

The plot is driven by a series of episodic challenges and overarching conflicts, including political tensions between humans and demons, internal power struggles within the academy, and external threats from rogue magical entities. Ronowe’s past as a legendary demon warrior is gradually revealed, adding depth to his character and explaining his motivations for teaching. His unyielding commitment to his students often puts him at odds with the academy’s administration, which prioritizes tradition and hierarchy over innovation and individuality.

As the series progresses, the students face increasingly complex moral dilemmas, forcing them to confront their own beliefs and the consequences of their actions. Ronowe’s lessons often blur the line between right and wrong, challenging the students to question authority and societal norms. The story balances moments of humor, action, and introspection, creating a multifaceted exploration of mentorship, identity, and the pursuit of knowledge in a world where magic and demons are intertwined.