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 | Hiroshi Seko | Series Composition |
| Directing | 渡辺歩 | Series Director |
| Visual Effects | 松元美季 | Character Designer |
| Sound | 帆足圭吾 | Original Music Composer |
| Sound | 高田龍一 | Original Music Composer |
| Sound | 岡部啓一 | Original Music Composer |
| Visual Effects | 秋元由紀 | Color Designer |
| Directing | 中野悟史 | Assistant Director |
| Art | 赤坂杏奈 | Art Direction |
| Art | 畠山佑貴 | Art Direction |
| Art | 多田周平 | Art Designer |
| Camera | 木村俊也 | Director of Photography |
| Editing | 小島俊彦 | Editor |
| Sound | 小泉紀介 | Sound Director |
| Art | 佐藤和巳 | Prop Designer |
| Art | Yuki Matsuo | Prop Designer |
| Visual Effects | 為水翔太郎 | Lead Animator |
| Crew | 小川猛 | Special Effects |
| Editing | 加藤慎也 | Online Editor |
| Editing | 石井知 | Online Editor |
| Sound | 勝俣まさとし | Sound Editor |
| Sound | 本郷俊介 | Sound Editor |
| Sound | 大隅啓良 | Music Producer |
| Production | Yuki Matsuzaki | Producer |
| Production | 下里悟 | Producer |
| Production | 倉島真由実 | Producer |
| Production | 吹野史斉 | Producer |
| Production | 北澤史隆 | Producer |
| Production | 外川明宏 | Producer |
| Production | Kazuya Nose | Producer |
| Production | 長谷川友紀 | Associate Producer |
| Sound | 早野利宏 | Sound Mixer |
| Writing | Yasuki Tanaka | Comic Book |
| Sound | 高野賢也 | Theme Song Performance |
| Sound | 田辺由明 | Theme Song Performance |
| Sound | 長谷川大喜 | Theme Song Performance |
| Sound | はっとり | Theme Song Performance |
| Art | Yasuki Tanaka | Original Series Design |
