Civilization has been destroyed by war and pollution, but the survivors have built the last city of Ecoban. As most natural resources have been exhausted, Ecoban is powered by pollution. The citizens of Ecoban need to continue creating this pollution leading them into conflict with the inhabitants of Marr while one man just wants to clear away the clouds and see the sky.
Is Wonderful Days on Netflix? Unfortunately the movie Wonderful Days is not yet available on Netflix.
| Sound | Won Il | Original Music Composer |
| Production | Lee Gyeong-hak | Producer |
| Writing | Jun-Young Park | Writer |
| Art | Jeong Yun-cheol | Art Direction |
| Production | Kay Hwang | Producer |
| Writing | Jeffrey Winter | Adaptation |
| Writing | Jay Lender | Writer |
| Writing | Michael Keyes | Writer |
| Crew | Sam Spiegel | Additional Music |
| Directing | Moon-saeng Kim | Director |
| Visual Effects | Young Ki Yoon | Animation Director |
| Writing | Young Ki Yoon | Storyboard |
| Writing | Moon-saeng Kim | Writer |
| Art | Lee Seok-yeon | Production Design |
