Love Your Enemy Episode 12

Seok Ji Won and Yoon Ji Won, born on the same day with the same name, have been rivals for years. After 18 years, they reunite when Seok Ji Won, now the executive director of Seokban Construction and chairman of Dokmok High School, returns home. Yoon Ji Won, once known as the "Dokmok High School Mad Dog," is a physical education teacher at the school. Both have changed, but their old rivalry reignites as they confront their past and present. (Source: MyDramaList)