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?
He talked to no one and 
was frequently absent,
No hablaba con nadie y faltaba mucho,
No hablaba con nadie y faltaba mucho,
Il ne parlait à personne
et séchait des cours.
Era un tipo irritante che,
 nonostante venisse poco a scuola,
Era um cara irritante, que,
apesar de não conversar com ninguém
В школу он не ходил, ни с кем не общался,
но при этом был лучшим учеником!