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?
from the outside, it looks like
 an old man collapsed mid-research
un anciano se desmayó
mientras investigaba
un anciano se ha desmayado
mientras investigaba
ce n’est qu’un simple vieillard
ayant fait une attaque
un signore anziano 
è finito in stato di morte cerebrale
это восприняли как смерть мозга старика,
который усиленно занимался наукой.