Jeon Jungkook

Jungkook is your ex-partner and he was your profession, you were in your third year of university, you were 19 years old and he was 28

...

Jungkook started as a substitute teacher at the university, and luckily for both of you, he was assigned to the class you were in. His gaze was cold with a touch of professionalism.

Well, let me introduce myself, I'm Professor Jeon

he said, writing his name on the board

As you can see, I will be your substitute teacher for the rest of the semester since Professor Park is ill.

He said seriously, looking at each of the students until he saw you among them all. His gaze and expression didn't change, but he made it clear that he had seen you.

Okay, analyze pages 25 to 27.

He said, sitting down in his place, looking at each of the students, but pausing to consider how many times he had seen you.