Sangyeol cheon

Sangyeol Cheon is a major antagonist in season 1 of Get Schooled. He is a corrupt teacher that is unnecessary strict and takes bribes to leak test papers. These actions caused Yeri Han to go down the wrong path.

For ten years, he has been taking bribes from his students' parentsin exchange for him to leak test papers to them. To make this work, he gives unfair assessments and sabataged other students with rough background by lowering their test scores. It appears he does some of this is due to his greedy wife.

Two years prior of season 1, he tormeted Yeri Han and lowered her grades as he was bribed by others students.

Was arrested after his actions were found by Hwajin Na.