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 us from this world will be 
Takasaki-kun and Takigawa-san.
In dieser Welt sind Takasaki-kun
und Takigawa-san.
En este mundo están Takasaki
y Takigawa.
En este mundo estáis Takasaki
y Takigawa.
Dans ce monde,
nous sommes Takasaki et Takigawa.
I noi stessi del tuo mondo
 chiamali Takasaki e Takigawa.
Neste mundo serão o
Takasaki e a Takigawa.
Вы из этого мира — Такасаки и Такигава.