A conversation unfolds between two individuals, Bok Su and Soo Jeong, who haven't seen each other in nine years. Bok Su confronts Soo Jeong about past misunderstandings, including the rumor that Bok Su pushed someone off a rooftop and that Soo Jeong felt sorry for Bok Su because of his difficult home life. Soo Jeong reveals that she liked Bok Su genuinely and not out of pity. The two reconcile and decide to start anew.
The scene then shifts to a school setting, where Bok Su has returned after a two-day absence. He is welcomed back by his friends and teacher, Mr. Kim. Meanwhile, Soo Jeong is introduced as a teacher, who is revealed to have a past connection with Bok Su. As the story progresses, Soo Jeong struggles with her feelings for Bok Su, now her student, and tries to maintain a professional distance.
Here are the key facts extracted from the text:
1. Nine years ago, someone was accused of pushing Se Ho from the rooftop.
2. Kang Bok Su was absent from school for two days.
3. Bok Su returned to school and was assigned to clean up as punishment.
4. Bok Su's teacher, Mr. Kim, has high blood pressure.
5. Bok Su has a past relationship with a person named Soo Jeong.
6. Soo Jeong is now a teacher at Bok Su's school.
7. Bok Su and Soo Jeong had a misunderstanding in the past that led to a nine-year separation.
8. Bok Su's past involved living with his grandmother and receiving food stamps.
9. Bok Su's classmates made fun of him when they found out about his living situation.
10. Soo Jeong is trying to move past the misunderstanding and start anew with Bok Su.
11. Mr. Park is planning a site survey in Chungju and needs a teacher to accompany him.
12. Mr. Ma and another teacher are initially chosen to go, but Mr. Ma falls ill, and Ms. Son takes his place.
13. Ms. Son and Bok Su have a close relationship, but she reminds him to call her "Ms. Son" and not to get too familiar.