Osanai Kei enjoys a peaceful and happy life with his wife Osanai Kozue and daughter Osanai Ruri, but his wife and daughter die in an accident. Osanai Kei's life suddenly changes. One day, a man named Misumi Akihiko visits Osanai Kei. Misumi Akihiko tells him that on the day Osanai Kozue and Osanai Ruri died, Osanai Ruri, who was a complete stranger to him, was coming to see him. Misumi Akihiko tells him about a woman named Masaki Ruri, who he once loved. These people, who don't seem related, connect under the name of love.
Unfortunately the movie Phases of the Moon is not yet available on HBO Max.
| Directing | Ryuichi Hiroki | Director |
| Writing | Shogo Sato | Novel |
| Camera | Noriyuki Mizuguchi | Director of Photography |
| Art | Tomoyuki Maruo | Production Design |
| Production | Takashi Yajima | Producer |
| Production | Takeshi Udaka | Producer |
| Writing | Hiroshi Hashimoto | Screenplay |
| Editing | Minoru Nomoto | Editor |
| Sound | Fukushige Mari | Original Music Composer |
| Sound | Mari Shinohara | Sound Engineer |
| Production | Hirotaka Aragaki | Producer |
| Production | Hitoshi Endo | Producer |
| Visual Effects | Shinji Ohagi | VFX Supervisor |
| Production | Yasushi Minatoya | Line Producer |
| Art | Shôgo Yoshimura | Decorator |
| Costume & Make-Up | Rikiya Sô | Special Effects Makeup Artist |
| Lighting | Takafumi Kitaoka | Gaffer |
| Production | 田中智明 | Production Manager |
| Sound | 佐藤祥子 | Sound Effects |
