Jae Kon Yu wants his daughter to get a good education but Eun Byul is resistant to the idea. Jang Si Yan talks with Jae Kon Yu concerning enrolling Eun Byul at his school.
Eun Byul issues a warning to Moo Shin as he breaks her phone. Some girls at the school dislike Eun Byul and they becomes jealous when she talks to Mo Se.
Jang Si Yan is violently attacked by a thug working for Jae Kon Yu. Teachers go out for a night of drinking and they share various thoughts about marriage as well as love.
Jae Lon Yu is taken to the hospital after a stabbing and Eun Byul worries for her father. A detective shows up at school to question Moo Shin about his possible involvement in a crime.
Shin So Yi walks past Jang Si Yan while he is standing outside her apartment. Moo Shin learns that one of his friends is going to meet a gangster and he takes action to stop the event.
Criminals appear at a student's home but Jang Si Yan tries to change the situation before anyone is hurt. A fight occurs at school and some students suffer minor injuries during the incident.
Eun Byul hopes to celebrate Mr. Jang's brithday but her father shows up instead. Jang Si Yan talks with Moo Shin after he declares money is more important than graduating.
A nervous Miss Shin meets Eun Byul and Jang Si Yan while walking home. Students see Miss Shin with a doctor and assume Jang Si Yan has ended their relationship.
Jae Kon Yu will do anything to stop Eun Byul from flirting with her teacher. At a restaurant, Moo Shin fights to help a friend after someone violently hits her.
Eun Byul makes everyone believe that she and Jang Si Yan are growing closer. Shin So Yi brings food to Jang Si Yan's home but Eun Byul is hiding in the closet.
Eun Byul is startled after her bodyguard unexpectedly appears. Jae Kon Yu cooks dinner for Jang Si Yan and Shin So Yi in the hopes of stopping his daughter's current obsession.
Eun Byul and Si Yan are kidnapped by local thugs who are collecting a debt. Police arrive at the warehouse as Eun Byul is rescued by a man that works for her father.
Jang Si Yan slaps Moo Shin after quitting his job at the high school. Students think back to things that Jang Si Yan said during his time as a teacher.
The principal scolds teachers for acting irresponsibly at school as their actions negatively impact students. Moo Shin sees Eun Byul at a restaurant and they smile about their upcoming graduation.
Eun Byul and Jang Si Yan leave as her father's men pursue them. Min Sakang comes back as a student teacher and finds things have changed since she graduated.