Shingo Fujimori

Seven teens discover their bedroom mirrors are portals, and they're pulled from their lonely lives to a wondrous castle filled with winding stairways and watchful portraits. A girl in a wolf mask invites them to play a game.

A factory town is covered by chimney smoke, and as the townspeople haven't see the sky in centuries, they no longer believe that stars exist. A chimney sweep and a friendly monster named Poupelle decide to prove that stars are real.