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...
And how long are these two 
kids going to play this game?
Und wie lange wollen
diese Bälger hier noch rumalbern?
¿Y cuánto tiempo van a jugar así?
¿Y cuánto tiempo van a jugar así?
Et combien de temps
va durer ce jeu de marmots ?
E quanto vogliono andare avanti con questo gioco?
Até quando os garotos vão brincar disso?
Долго ещё эти ребятишки играться будут?