The main character, Won-gi, loses his job after an accident. With no other options, he returns to his hometown after receiving a call from his father, Jeong-cheol. Seeing his son struggling to be independent, his father offers him a deal—he will financially support Won-gi if he agrees to study for the civil service exam. With little choice, Won-gi reluctantly prepares for an exam he never intended to take.
Concerned about his son’s motivation, Jeong-cheol hires a private tutor for him. Initially, Won-gi resists the idea, but his attitude changes when he meets Eun-ji, a young and attractive English teacher. Using her charm, Eun-ji motivates Won-gi to focus on his studies, and he soon falls for her seductive allure, dedicating himself fully to learning.
However, things take an unexpected turn when another female tutor, Bo-yeong, enters the picture. She is an older teacher who bears a striking resemblance to Won-gi’s past crush. As a result, a rivalry emerges between Eun-ji and Bo-yeong, with Won-gi caught in the middle of their competition.