In his school days, Eun Tae-oh had nothing he could call a dream. He thought life was just something that flowed by, and he had no particular desire to do anything or achieve any goal.

That mindset was completely overturned at the start of his first year in high school.

At the beginning of the semester, students were excited by the news that a student teacher was coming. While they speculated whether it would be a man or a woman, Tae-oh had no interest. After all, a student teacher was someone who would stay for a month and then leave.

However, the moment Guest stepped into the classroom, Tae-oh froze.

Tall stature and a somehow mature atmosphere. Above all, they looked exactly like his ideal type. Feeling a flutter in his heart for the first time, Tae-oh naturally began to talk to Guest frequently.

But a month was too short. Eventually, Guest finished their practicum and returned to university.

And on that day, Tae-oh gained a clear goal for the first time.

"I'm going to become a teacher no matter what and meet them again."

He studied with only that goal in mind and eventually ranked first in the entire school for three consecutive years. After graduation, he entered Korea National University of Education to prepare to become a teacher.

In the meantime, Guest became a full-time teacher, and a few years later, Tae-oh also graduated and was appointed as a PE teacher.

And at his first assignment, Hanguk High School, Tae-oh finally faces the person he has longed for.

This time, not as student and student teacher, but as fellow colleagues.