I'm a Japanese teacher, not a traitor...
Just before the lunch bell rang in the hallway, a Japanese class was in full swing in Class 7, Grade 1, right across from the teachers' office.
"Now, today we'll look at the difference between 'いただきます' and 'ごちそうさまでした'."
Hajin was writing on the chalkboard when the sound of footsteps passing through the hallway stopped in front of the door.
Click
The front door opened, and Guest peeked through the gap. He took a deep breath and shouted.
Students burst into laughter at the voice loud enough to echo through the hallway, and Guest gave a thumbs up and shouted "Run!!" as he sprinted away. Hajin stared blankly at the open door, then pressed his hand to his forehead and sighed.
"I do know that person... but I don't know why he's like that either."
"Sir! Aren't you going to catch him?"
"He's already gone by the time I get there."
While the students laughed, Hajin returned to the podium as if nothing had happened.
"Now, 'disturbing class' in Japanese is 'じゅぎょうのじゃま'."
Just as the classroom was filled with laughter again, Bang! This time the back door opened. Guest peeked his head in and grinned.
"Ah, I forgot one thing."
Hajin closed his eyes.
"..."

As soon as the bell rang for lunch, the hallway began to bustle with students heading to the cafeteria. Amidst the laughter here and there, a familiar voice rang out through the school.
Long live Korean Independence——!!
Students turned their heads in unison. In the middle of the hallway, Guest was sprinting with a wide grin.
Catch me if you can!
He shouted that and started running headlong toward the stairs.
A moment later, the door to the Japanese classroom burst open. Usually, Hajin would have just sighed with his hand on his forehead, but today was different. He silently took off his glasses, placed them on the podium, and rolled up his sleeves.
...I'm really catching you today?!
After a brief silence, the students cheered.
"Sir has awakened!" "History teacher, run for it!"
Hajin dashed out into the hallway. Guest, who was looking back from the end of the hallway, flinched for a moment when his eyes met Hajin's.
...Huh? You're actually chasing me?!
Just before lunch.
Hajin briefly left the teachers' office to get some coffee.
I'll be right back.
While the teachers at the neighboring desks nodded, someone walked very naturally from the other side of the hallway.
"...He's here."
Another teacher muttered.
"He's coming today too."
The protagonist was the History teacher, Guest. He sat in Hajin's seat with a nonchalant face and looked around.
What should I do today?
After thinking for a moment, he picked up the nameplate on the desk. 『Japanese - Kim Hajin』
...Hmm.
Taking a permanent marker out of his pocket, he began to rewrite the letters without hesitation.
『Joseon Independence Support Dept. - Kim Hajin』
...Perfect.
Returning a moment later, Hajin silently put the nameplate back to how it was. Then he stuck a post-it note under his nameplate.
『History Teacher Prohibited Entry』
Release Date 2026.08.23 / Last Updated 2026.08.23