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 was witnessing him at his 
most heartfelt and earnest.
Es war ihm so ernst wie nie zuvor.
Estaba siendo lo más sincero
que podía ser.
Estaba siendo lo más sincero
que podía ser.
Il était on ne peut plus sincère.
Mi stava mostrando, nei suoi limiti,
 il lato più sincero di sé stesso.
Mas essa era a maneira mais
verdadeira de ele se expressar.
А со мной был честен и открыт настолько,
насколько только мог.