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?
shouldn't we be almost 
entirely different people?
Auch wenn wir Koyomi sind,
sind wir komplett unterschiedliche Menschen.
Será prácticamente otra persona.
Será prácticamente otra persona.
On pourrait pas être identiques.
Anche se sono lo stesso Koyomi,
 è normale che siamo diversi.
Mesmo sendo o mesmo Koyomi,
seria praticamente outra pessoa.