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.
but in the case of step-siblings, 
they start off as strangers
،لكن في حالة الأخوة غير الأشقاء
يبدؤون كغُرباء
Bei Stiefgeschwistern,
die sich von Anfang an fremd sind,
pero los hermanastros
lo son desde el principio
pero los hermanastros
lo son desde el principio
mais un demi-frère par alliance
est à l’origine un inconnu,
ma se parliamo di un fratellastro, 
allora è uno sconosciuto all'inizio
Mas, no caso de meios-irmãos,
eles começam como estranhos
Значит, для сводных это
 должно быть ещё проще,