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