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?
I've been the Kazune Takigawa 
of this world the whole time.
Ich war die ganze Zeit
Takigawa Kazune von dieser Welt.
Siempre fui la Kazune Takigawa
de este mundo.
Siempre he sido la Kazune Takigawa
de este mundo.
J’ai toujours été
la Kazune Takigawa de ce monde.
Io sono sempre stata
 la Kazune Takigawa di questo mondo.
Eu sempre fui a Takigawa
Kazune deste mundo.
Всё это время я была
Кадзунэ Такигавой из этого мира.