Lee Jang Hoon

Yun Ga Min, a student at the struggling Yusung Technical High School, is determined to go to college despite his poor grades and knack for fighting. He forms a study group but is forced to use his fighting skills to protect his friends from bullies. His teacher, Lee Han Gyeong, who tutored him while he was a middle school student, returns as a temporary teacher with a secret and hopes to improve the school. (Source: MyDramaList) ~~ Adapted from the webtoon "Study Group" (스터디그룹) written by Shin Hyung Wook (신형욱) and illustrated by Ryu Seung Yeon (류승연).