In the children's room of the Amanogawa household in the neighborhood of Shichifukujin, there are five Engimon: Haruo (a papier-mache dog), Kin-chan (a goldfish paper balloon), Hebikura (a bamboo snake), Chief Daruma (a daruma doll), and Koume (a Kokeshi doll). They are always watching over the siblings of the household, Himi and Yamato. One day, an Engimon from somewhere else appears, and Himi leaves the house to chase it. Haruo and his friends come alive, much to Yamato's surprise, and together they go to rescue Himi.

[Source: Anime News Network]

Oh no, poor Kuromi!
Today is Kuromi’s birthday...
but everyone is busy getting ready for Halloween!

THIS STINKS!!!
Kuromi’s scream opens a door to the multiverse and she finds herself sucked into a world of zombies!

Will Kuromi find a way to get back to her own world?!

[Source: official website]