In the last chapter of the Refrain Blue series, the bond between Yoshihiro Matsunaga and Nao Morisawa grows stronger, while Yoshihiro finally finds out the identify of the mysterious girl from the first chapter.
Is Refrain Blue: Chapter 3 - Eternal Blue Waves on Netflix? Unfortunately the movie Refrain Blue: Chapter 3 - Eternal Blue Waves is not yet available on Netflix.
| Camera | Takashi Azuhata | Director of Photography |
| Directing | Norio Kajima | Director |
| Production | Saburo Omiya | Producer |
| Sound | Kouichi Iizuka | Sound Director |
| Sound | Hikari Okamoto | Theme Song Performance |
| Visual Effects | Mayumi Watanabe | Character Designer |
| Visual Effects | Mayumi Watanabe | Animation Director |
| Writing | Takawo Yoshioka | Screenplay |
