To help manage his recently deceased grandmother's effects, the protagonist Takahara Hairi travels to Torishirojima during his summer vacation. As he gets off the ferry boat, he spots a lone girl standing on the pier. A girl who simply gazes into the distance as her long hair flutters in the wind. He looks at the girl in utter bewilderment, but before he realizes it, she can no longer be found anywhere.
| Writing | Keiichiro Ochi | Series Composition |
| Visual Effects | Mai Otsuka | Character Designer |
| Visual Effects | Sari Tagawa | Color Designer |
| Art | Kaoru Aoki | Art Designer |
| Art | Shunichiro Yoshihara | Art Direction |
| Writing | Jun Maeda | Original Concept |
| Writing | Niijima Yuu | Original Story |
| Writing | Kai | Original Story |
| Writing | Hasama | Original Story |
| Sound | Konomi Suzuki | Theme Song Performance |
| Directing | Tomoki Kobayashi | Series Director |
| Camera | Fumito Nanba | Director of Photography |
| Editing | Rumi Maruyama | Editor |
| Sound | Ryosuke Naya | Sound Director |
| Sound | Shinji Orito | Original Music Composer |
| Sound | Jun Maeda | Original Music Composer |
| Sound | Donmaru | Original Music Composer |
| Sound | Tomohiro Takeshita | Original Music Composer |
| Sound | Mizutsuki Ryou | Original Music Composer |
| Sound | Ohashi Shuuhei | Original Music Composer |
