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?
Dad bought it for me last time I saw him.
Vater hat mir die gekauft,
als ich ihn getroffen hab.
Me la regaló mi papá cuando nos vimos.
Me la regaló mi padre cuando nos vimos.
Papa me l’a acheté
quand je suis allé le voir, l’autre jour.
Me l'ha comprato papà
 quando ci siamo visti l'ultima volta.
É um presente de aniversário de 8 anos que
meu pai comprou no outro dia que nos vimos.
Папа мне купил,
когда ездили в магазин.