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?
It all seemed so ridiculous 
and lacking in common sense.
Ich habe mich gefragt, was er sich
da nur für dummen Unsinn denkt.
Se le había ocurrido
algo ilógico y absurdo.
Se le había ocurrido
algo ilógico y absurdo.
Je trouvais son idée
insensée et ridicule.
"Ma che follie senza logica
 ti passano per la testa?", gli chiesi.
Это же вздор какой-то,
глупость несусветная!