South Korean actor Joa Hyun-jae has returned to Taiwan after 7 years to promote the film. Today, he and director Byun Geon-sung worked together to create buzz for the movie. Joa Hyun-jae has a deep bond with his daughter in the film, and this is also true outside of the film. He revealed that he and his daughter sing songs in an alien language together, which only we can understand, and his wife cannot.