"Too Hot For Teacher" centers around the life of a young high school student, Kenta, who finds himself in an unexpected and complicated situation when his new homeroom teacher, Ms. Aoi, turns out to be a former childhood friend. Ms. Aoi, now a strikingly beautiful and confident woman, re-enters Kenta's life with a mix of nostalgia and unresolved feelings from their past. The series explores the dynamics of their rekindled relationship, set against the backdrop of a high school environment filled with gossip, peer pressure, and societal expectations.

Kenta struggles to balance his academic responsibilities and personal life while navigating the growing emotional tension between himself and Ms. Aoi. The narrative delves into themes of forbidden attraction, the complexities of adult-adolescent relationships, and the challenges of maintaining professionalism in emotionally charged situations. Supporting characters, including Kenta's classmates and fellow teachers, add layers to the story, often serving as catalysts for key plot developments or providing contrasting perspectives on the central relationship.

The series maintains a focus on the ethical dilemmas and emotional consequences of the characters' actions, avoiding gratuitous sensationalism. Ms. Aoi's internal conflict between her professional duties and personal feelings is a recurring theme, as is Kenta's journey of self-discovery and maturity. The plot unfolds through a series of escalating events, including misunderstandings, confrontations, and moments of introspection, culminating in a resolution that addresses the consequences of their choices. The narrative structure emphasizes character development and emotional depth, offering a nuanced portrayal of the challenges faced by both Kenta and Ms. Aoi.