Butterfly Sleep Ryoko Matsumura is a popular writer in her 50's. She also knows that she has Alzheimer’s. Ryoko Matsumura begins to teach at a university. She meets a young Korean man in his 20's. They become attracted to each other. Details Casts Videos Galleries Posters Title Butterfly Sleep Release Date 2018-05-12 Runtime 01 Hours 51 Minutes Genres Drama Romance Production Companies Zoa Films, SIGLO Production Countries Japan, South Korea Miho Nakayama... Ryoko Matsumura... Kim Jae-wook... Chan-hae... Anna Ishibashi... Anna... Shun Sugata... Ryuji Ayamine... Masanobu Katsumura... Ishii... Masatoshi Nagase... Omura... Hidekazu Mashima... Kousuke... Asami Shibuya... Saori... Butterfly Sleep - Trailer (나비잠 예고편) (Trailer) Original Size (2000x1123) Original Size (1926x1082) Original Size (1924x1082) Original Size (2000x1125) Original Size (2000x1125) Original Size (1500x844) Original Size (1400x2100) Original Size (2000x3000) Original Size (2000x3000) Original Size (2000x3000) Original Size (1500x2144) Original Size (1343x1913) Original Size (2000x2850) Original Size (2000x3000) Original Size (1400x2100) Original Size (525x750)