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?
The light is changing. 
Please exit the crosswalk.
Va a cambiar el semáforo,
Va a cambiar el semáforo,
Le feu va passer au rouge.
Il semaforo sta per scattare.
O sinal vai fechar.
Время для перехода заканчивается.