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?
and the next day after that, 
and the next next day after that,
et le jour suivant,
puis le jour encore après…
E quello dopo ancora.
и через ещё один…