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?
you were in parallel world 85 
for a while recently, right?
Du warst doch vor Kurzem in einer
Parallelwelt, die 85 Welten entfernt war?
estuviste un tiempo en el mundo 85, ¿no?
has estado un tiempo
en el mundo 85, ¿no?
mais tu étais dans le monde 85
pendant quelque temps, n’est-ce pas ?
tu negli ultimi tempi
Ты же несколько дней
провела в восемьдесят пятом мире?