In een andere wereld heeft een steeds groter wordende Zee van Sneeuw het planeetoppervlak overspoeld. De mensen worstelen om te overleven terwijl ze rond de routes van een enorme baanboom leven, waarvan de takken zich hoog boven de grond in het hemelmembraan verspreiden. Er komt verandering in deze stervende wereld nadat Kaina, een jongen uit het hemel membraan, een meisje van de oppervlakte tegenkomt dat Ririha heet.
大雪海のカイナ kun je nu online kijken op de onderstaande streaming platforms.
| Directing | 安藤裕章 | Series Director |
| Sound | 馬瀬みさき | Original Music Composer |
| Sound | KOHTA YAMAMOTO | Original Music Composer |
| Writing | 村井さだゆき | Series Composition |
| Sound | 澤野弘之 | Main Title Theme Composer |
| Art | 田中直哉 | Production Design |
| Crew | Takuma Ishibashi | CG Supervisor |
| Visual Effects | Ryouhei Fukushi | Character Designer |
| Art | 久保季美子 | Art Direction |
| Visual Effects | 小谷杏子 | Character Designer |
| Crew | Masaki Taga | CG Supervisor |
| Art | Kazuma Teshigahara | Production Design |
| Sound | 土屋雅紀 | Sound Director |
| Visual Effects | Kazumasa Isawa | Layout Supervisor |
| Visual Effects | 松本吉勝 | 3D Supervisor |
| Visual Effects | 野地弘納 | Color Designer |
| Art | 片塰満則 | Conceptual Design |
| Sound | 西名武 | Music Producer |
| Editing | Kazunari Hoshino | Editor |
| Sound | 浅川祥幸 | Sound Mixer |
| Sound | 倉橋裕宗 | Sound Effects |
| Production | Yuko Hamamoto | Producer |
| Production | 森彬俊 | Producer |
| Production | 高扬帆 | Executive Producer |
| Production | 末平アサ | Executive Producer |
| Production | William Ireton | Executive Producer |
| Production | 桑田靖 | Executive Producer |
| Production | 川上大輔 | Executive Producer |
| Production | Mitsuharu Moriya | Executive Producer |
| Production | 葛仰骞 | Executive Producer |
| Production | Shuzo John Shiota | Executive Producer |
| Writing | 弐瓶勉 | Comic Book |
| Visual Effects | Taichi Sudou | Effects Supervisor |
| Visual Effects | Kazumasa Isawa | Animation Supervisor |
| Lighting | Mai Kouno | Rigging Supervisor |
| Visual Effects | Choon Ho Tee | Compositing Supervisor |
| Visual Effects | Hiroyuki Matsushima | Compositing Supervisor |
| Visual Effects | Daiki Seo | Modelling Supervisor |
| Visual Effects | Shuhei Kitano | Modelling Supervisor |
| Visual Effects | Lim Yew Chin | Animation Director |
| Visual Effects | Miyuki Kamiya | Animation Supervisor |
