High school student Naotatsu travels to live at his uncle's house. In the pouring rain, he is picked up at the nearest station by a strange adult woman named Sakaki who guides him to an unexpected share house where a life together begins.
Unfortunately the movie The Water Flows to the Sea is not yet available on Disney Plus.
| Production | Yohei Takami | Executive Producer |
| Production | Keisuke Konishi | Executive Producer |
| Production | Ayumi Kondo | Producer |
| Directing | Tetsu Maeda | Director |
| Writing | Satomi Oshima | Screenplay |
| Writing | Retto Tajima | Original Story |
| Camera | Naoya Ikeda | Director of Photography |
| Production | Yûji Hiratai | Executive Producer |
| Production | Yukiko Deki | Executive Producer |
| Production | Yoshie Wada | Executive Producer |
| Production | Shuhei Sekiguchi | Production Director |
| Lighting | Hideki Tateno | Gaffer |
| Sound | Toru Nishiyama | Sound Recordist |
| Directing | Kyouhei Tamazawa | Assistant Director |
| Editing | Hanako Tabata | Editor |
| Sound | Shoko Sato | Sound Effects |
| Costume & Make-Up | Michiru Iwamoto | Makeup & Hair |
| Art | Masato Nunobe | Art Direction |
| Art | Kiyotaka Ohara | Decorator |
