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?
Can't we just distinguish ourselves 
with first and last names?
Usemos nombres y apellidos
para distinguirnos.
Usemos nombres y apellidos
para distinguirnos.
tu n’as qu’à nous appeler
différemment.
Non è meglio distinguerci
 chiamandoci per nome o cognome?
Que tal usarmos nomes
e sobrenomes para diferenciar?
Давай по имени и фамилии поделим.