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 first team we joined was assigned
 to improve their reliability.
Das Team, in das wir zuerst gekommen sind,
En nuestro primer equipo
En nuestro primer equipo
L’équipe que nous avons intégrée
Il primo team a cui fummo assegnati
A primeira equipe a que fomos designados
и нас с Кадзунэ назначили в команду,
в которой мы должны были его побороть.