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?
For example, let's say there were 100 
worlds with 100 of me and 100 of you.
Wenn es zum Beispiel
hundert Versionen von dir gibt,
Por ejemplo,
imagínate que hubiera 100 tús y 100 yos.
Por ejemplo,
imagínate que hubiera 100 tús y 100 yos.
Par exemple, s’il y avait 100 toi
et 100 moi dans ce monde,
Ad esempio,
Por exemplo,
Например!..