This is full trailer for very promising computer animated movie Oblivion Island: Haruka and the Magic Mirror.
The film is about a girl named Haruka, that discovers a different dimension, where strange creatures gather childhood toys, memorabilia and forgotten items as their owners grow up. With their booty, the creatures have built their own city called Oblivion Island.
Oblivion Island will join number of other stories about a girl that goes on adventure in some magical world, like Alice in Wonderland, MirrorMask, Labyrinth or Spirited Away, and I hope it will be at least as good as them.
Source: Official Website, via Twitch.