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?
As in, the research facility 
where my father works.
dem japanischen
Imaginärelementwissenschaftslabor.
là où travaille mon père.
ossia l'istituto di ricerca
 in cui lavora mio padre.
que é onde meu pai trabalha.
Иначе говоря,
научный институт моего отца.