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.
And that's perfectly normal, because even 
if we suddenly become siblings one day,
وهذا طبيعيّ جدّاً، لأنّنا حتّى لو أصبحنا
ذات يوم أشقاء فجأة
Nur weil man plötzlich zu Geschwistern wird,
Aunque se conviertan
en hermanos de golpe,
Aunque os convirtáis
en hermanos de golpe,
Même si on se retrouve
tout à coup frère et sœur,
Se un giorno, improvvisamente, 
io e un ragazzo diventassimo fratello e sorella,
Mesmo que um dia ele se torne
seu irmão de repente,
Мне кажется, это само собой разумеется:
และมันเป็นเรื่องธรรมดามาก,
เพราะหากว่า