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?
My desire at present is to 
bring about that miracle.
Ich will dieses Wunder
jetzt geschehen lassen.
Y yo quiero obrar el milagro.
Y yo quiero crear el milagro.
Et je pense qu’il est grand temps
de le faire devenir réalité.
E io, in questo momento,
E agora eu quero fazer com
que esse milagre aconteça.
Ну а я сейчас…
хочу сделать его возможным.