Everyone around Futaba expects her to grow up and become an adult, and she's lost the ability to keep herself mentally balanced. At the bottom of her heart, her childish self is still there, and still strong. One day she wanders into another dimension, a world where the light has been lost, and darkness rules. The people there exist as babies wearing only their underpants...
People have lived in the 
darkness for so long that
Die Menschen leben schon
so lange in der Finsternis,
La gente vive en la oscuridad
hace tanto que
La gente vive en la oscuridad
desde hace tanto que
Les gens vécurent longtemps
dans l’obscurité
La gente ha dovuto vivere
nell'oscurità per così tanto tempo
As pessoas viveram na
escuridão por tanto tempo
Люди уже давно живут в беспросветной тьме,