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?
I left to go to the Showa-dori 
intersection. Is that accurate?
Ich bin doch zur
Showa-Kreuzung gegangen, richtig?
¿Me fui hacia el cruce de Showa-dori?
¿Me fui hacia el cruce de Showa-dori?
On est d’accord
que je suis allé au carrefour Showa ?
Ti risulta che sono uscito poco fa
 per andare all'incrocio di Showa-dori?
Sabe que fui até o cruzamento
da rua Showa, certo?
Давай уточним… я из дома пошёл
на перекрёсток Сёва-дори?