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?
but at that age, I couldn't 
really wrap my head around it.
Aber damals habe ich
das noch nicht verstanden.
pero entonces era muy joven
para entenderlo.
pero entonces era muy joven
para entenderlo.
mais à cet âge,
j’avais du mal à tout saisir.
ma il me stesso di allora
non fu in grado di capirlo per bene.
mas eu não era capaz de
entender bem nessa época.
но я был слишком мал,
чтобы понять, о чём он говорил.