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'm sure the 100 me's 
would love the 100 you's.
dann lieben die hundert Ichs
bestimmt die hundert Dus.
Seguro que los 100 yos
amarán a las 100 tús.
Seguro que los 100 yos
amarán a las 100 tús.
je suis persuadé que ces 100 moi
aimeraient ces 100 toi.
quei cento me
esses cem "eus"
Тогда каждый я
буду любить каждую тебя.