Rich mother 'Ji-sook' succeeded in recruiting 'Joo-yeon', a coordinator for high-cost entrance exams, who selects and guides only a small number of excellent students through a referral while searching for a competent private tutoring coordinator to send their son 'Se-hyeok', a retraining student, to medical school. 'Namjae', the father of 'Eun-tae', a high school student next door, also heard the rumors and contacted 'Joo-yeon' to be cast. As the parents of Se-hyeok and Eun-tae, who are neighbors, enter into a strange rivalry, Joo-yeon, who is in an embarrassing situation, eventually agrees with the two families to share the days of the week and guide Se-hyuk and Eun-tae. 3rd student Eun-tae has no interest in going to medical school and is only busy thinking about playing with her third-year-old girlfriend, and Se-hyeok starts to go for the beautiful tutor Joo-yeon rather than studying for the entrance exam.