High School Return of a Gangster (Korean drama) - Season 1 - Episode 3

Kim Deuk Pal is a 47-year-old gangster, who is the #2 guy in his gang. He doesn’t have an educational background due to his poor parents, but he has a dream of attending a university. He has been studying to achieve his dream, but it’s not easy. One day, he sees a young man, Song Yi Heon, about to kill himself. At that time, Deuk Pal’s spirit possessed the body of the suicidal 19-year-old high school student.