Bij het horen van de dood van Ushio keert Shinpei terug naar zijn geboorteplaats Wakayama City op Hitogashima en herenigt hij zich met de familie van zijn jeugdvriend. De begrafenis verloopt vlot, maar onder de oppervlakte broeit er iets vreemds op het eiland. Welke mysteries staan hem te wachten op dit afgelegen zomereiland?
| Writing | 瀬古浩司 | Series Composition |
| Directing | 渡辺歩 | Series Director |
| Visual Effects | Miki Matsumoto | Character Designer |
| Sound | Keigo Hoashi | Original Music Composer |
| Sound | Ryuichi Takada | Original Music Composer |
| Sound | Keiichi Okabe | Original Music Composer |
| Visual Effects | Yuki Akimoto | Color Designer |
| Directing | 中野悟史 | Assistant Director |
| Art | Anna Akasaka | Art Direction |
| Art | Yuuki Hatakeyama | Art Direction |
| Art | Shuhei Tada | Art Designer |
| Camera | Toshiya Kimura | Director of Photography |
| Editing | Toshihiko Kojima | Editor |
| Sound | Kisuke Koizumi | Sound Director |
| Art | Kazumi Sato | Prop Designer |
| Art | Yuki Matsuo | Prop Designer |
| Visual Effects | 為水翔太郎 | Lead Animator |
| Crew | Takeru Ogawa | Special Effects |
| Editing | Shinya Kato | Online Editor |
| Editing | Chika Ishii | Online Editor |
| Sound | Masatoshi Katsumata | Sound Editor |
| Sound | Shunsuke Hongo | Sound Editor |
| Sound | Hiroyoshi Oosumi | Music Producer |
| Production | Yuki Matsuzaki | Producer |
| Production | 下里悟 | Producer |
| Production | 倉島真由実 | Producer |
| Production | Fuminari Fukino | Producer |
| Production | Fumitaka Kitazawa | Producer |
| Production | Akihiro Sotokawa | Producer |
| Production | Kazuya Nose | Producer |
| Production | Tomonori Hasegawa | Associate Producer |
| Sound | Toshihiro Hayano | Sound Mixer |
| Writing | Yasuki Tanaka | Comic Book |
