Nine years after getting wrongly expelled from high school, a man re-enrolls with a plan to expose the truth and make his enemies pay.
EPISODE 1
Episode 1
The popular Bok Su teams up with the studious Soo Jeong to improve his grades. Later, Bok Su starts developing feelings for Soo Jeong as their private lessons progress.
EPISODE 2
Episode 2
In 2018, Soo Jeong gets conned by her colleague and ends up paying a great deal of money to become a full-time teacher at Sulsong High School.
EPISODE 3
Episode 3
Bok Su dives into the river to save the woman who seems to have tried to kill herself; he's shocked to discover the woman is Soo Jeong; Young Min's revelation about Sulsong High School's education system stirs up public outrage and sparks a protest.
EPISODE 4
Episode 4
Mr. Park, who was Bok Su's homeroom teacher in high school, visits Bok Su and suggests that he should go back to school.
EPISODE 5
Episode 5
Bok Su puts his old school uniform back on and goes back to the school he dropped out almost a decade ago; old friends show up as his teachers, and even the chairman of the school board; Bok Su is assigned to the same classroom as his nephew.
EPISODE 6
Episode 6
After his first day back to school, Bok Su can't stop thinking about Soo Jeong and about what happened between them in the past; Soo Jeong is shocked to have Bok Su as her student; Bok Su calls Soo Jeong to the rooftop to resolve what happened.
Yoo Seung-ho
Jo Bo-ah
Kwak Dong-yeon
Kim Dong-young
Park Ah-in
Kim Mi-kyung
Park Seon-ho
Ham Jun-ho
Han Jung-hwan
