The twins build a hut by the river and spend their summer days there. One day, as the summer draws to a close, the children decide to stay in the cabin alone but...
| Directing | Yorifusa Yamaguchi | Director |
| Production | Kimio Yabuki | Producer |
| Writing | Junki Takegami | Writer |
| Visual Effects | Kazuo Komatsubara | Animation Director |
| Art | Isamu Tsuchida | Art Direction |
