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?
but even back then, oversight authorities
aber sogar damals musste
man für jedes Experiment
pero siempre que se hacía uno
pero siempre que se hacía uno
Mais à l’époque déjà,
il était obligatoire
ma già all'epoca, 
durante ogni fase di sperimentazione
Durante esse tempo,