An animated film made by a father who burst into tears while reading his elementary school-aged daughter's book has been invited to the competition section of the 31st Busan International Film Festival. “Long Long Night” is the only animated film among the 13 competition titles. Based on author Ru Ri's 2021 children's book of the same name, the film follows the journey of Norden, the last white rock rhinoceros on Earth, and a young penguin born from an abandoned egg. The original book has sold more than 800,000 copies, becoming a megahit in children's literature and a rare children's story that has also won enthusiastic support from adults. Director Youm Kyu-bock and producer Jung Kyoung-hee discussed the film's four-year journey to the screen at a press conference held Friday at the Busan Cinema Center in the city's Haeundae District. The project began with a book Youm's daughter brought home. Youm said he cried uncontrollably while reading "Long Long Night" to his daughter and became captivated by the friendship between the aging rhinoceros and the young penguin. "I felt I had to ma