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?
You don't need to copy bad stuff 
from the other kids.
Man muss den anderen
nicht alles nachmachen.
No imites lo que otros hacen mal.
No imites lo que otros hacen mal.
Tu n’as pas à copier
les bêtises des autres.
Non devi mica imitare gli altri
 anche quando fanno cose brutte.
А ты от них плохому не учись!