Black Dog: Being A Teacher (Korean: 블랙독; RR: Beullaek Dok) is a 2019–2020 South Korean television series starring Seo Hyun-jin, Ra Mi-ran and Ha Jun. It aired on tvN's Mondays and Tuesdays time slot from December 16, 2019 to February 4, 2020. It is a well-made drama in which viewers sympathized greatly with the realistic situation, conflicts and villains facing fixed-term teachers in the drama. Internationally, it is available streaming on Netflix.