Extracurricular
인간수업 (original)
A model high school student who's steeped in a world of serious crime finds his double life upended when a classmate takes an interest in his secret.
Starring Kim Dong-hee, Park Ju-hyun, Jung Da-bin, Nam Yoon-su, Kim Yeo-jin, Choi Min-soo, Park Hyuk-kwon, Seo Ye-hwa, Im Gi-hong
Watch "Extracurricular" on Netflix released in 2020. It's a crime and drama show, and has a rating of 7.6 out of 10 from Imdb which is usually fine for this kind of show.