High school student Yuta Asamura begins living with his stepsister Saki Ayase and her mother due to his father's remarriage. Both Yuta and Saki, who hold cautious values regarding relationships between men and women, agree to live with an appropriate sense of distance between them.
It might be exactly because 
we're the same age.
ربّما السّبب بالتّحديد هو لأنّنا في نفس السنّ
Vielleicht liegt es gerade am Alter …
Es que tenemos la misma edad.
La cosa es que tenemos la misma edad.
C’est justement ça, le problème.
Proprio perché abbiamo la stessa età...
Justamente por termos
a mesma idade...
Может, именно потому, что мы ровесники.