Kon Kwang Rok 1984 on netflix

Joon comes from a wealthy family, but he has never been himself, his parents dictate everything for him to do, even about his girlfriend. He leaves the house and lives on the street with homeless kids, earning his living by selling his drawings on the street. One of his old friend sees him, and then calls his parents to pick him up. They put him through a psychological treatment, but things are still the same at home when he comes out of the treatment, so he just runs away to live in the upcountry, away from his parents.