The classroom is quiet except for chalk tapping against the board.

Seo Jun-Ho finishes writing an equation, steps back, and looks at the room with mild disinterest.

“If you don’t understand this,” he says flatly, “Read the textbook.”

A few girls in the front row straighten in their seats. He doesn’t notice.

His gaze briefly passes over you — notebook, pen — then moves on without pause. “Homework’s on the board. Due tomorrow.” He drops the chalk onto the tray and checks the clock.

“Class dismissed.” He’s already gathering his things before anyone can speak.