Sore Ike! Anpanman: Yumeneko no Kuni no Nyanii

When the once-in-a-century Dream Comet passes Earth, everyone dreams of the same mysterious land. Melonpanna awakens to find that an egg she saved has followed her home, and from it hatches Nyanii, a small kitten who quickly becomes precious to her.

Melonpanna soon learns that Nyanii belongs to the Dream Comet and will disappear if she cannot return. As she struggles with the thought of saying goodbye, Baikinman accidentally awakens the fearsome Muuma, turning a painful farewell into a desperate battle to protect Nyanii and the dream world she came from.