Dangerous Romance - 1x01 - EP. 1- Followmy.tv

After school, scholarship student Sailom has to work a part-time job washing cars. When he comes across a group of students bullying his friend Auto, he attempts to do the right thing and present evidence of their cruelty to his homeroom teacher. However, the teacher doesn't take the harrassment seriously and exposes Sailom's actions to rich bully Kanghan. Kanghan does his best to make Sailom regret his intervention, going so far as to attempt to have Sailom fired. (Source: MyDramaList)