 But just when Wan-deuk has come to rely on Dong-ju's tutorship, the latter is arrested by the police for helping illegal immigrant workers.In a Q&A session after the world premiere at the Busan International Film Festival, director Lee Han stated that the female character Lee Ho-jeong, who was not in the original novel, was added as the love interest of high school teacher Lee Dong-ju to allow the audience to empathize with him more.The ethnicity of Wan-deuk's mother was changed from Vietnamese in the novel to Filipina in the film.