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.
You can now watch Butterfly Sleep online on the following streaming providers in the United States.
| Directing | Jeong Jae-eun | Director |
| Writing | Jeong Jae-eun | Screenplay |
| Editing | Lee Young-lim | Editor |
| Production | Tetsujiro Yamagami | Producer |
| Production | Lee Eun-kyeong | Producer |
| Sound | Masatoshi Saito | Sound |
| Camera | Hiroshi Iwanaga | Director of Photography |
| Production | Toshiaki Sakamoto | Producer |
| Production | Lee Eun-kyung | Executive Producer |
