While struggling to make friends after his parents’ divorce, Koyomi Takasaki meets Kazune Takigawa, but apparently, they already have. Kazune reveals that she’s from World Line 85, an alternate universe in which she and Koyomi are lovers. But in a reality where moving between dimensions is natural, could Koyomi be the one from another world?
The only things it had in excess 
were empty space and ceilings.
Es war alles voller Luft und Decke.
Prácticamente solo había aire y techo.
Prácticamente solo había aire y techo.
Ce n’était qu’un grand espace vide
avec un toit.
Le uniche cose che abbondavano
 erano l'aria e i soffitti.
Era cheio de ar. E tetos.
Зато воздуха
и свободного места было вдоволь.