Your little sister, Natsuki, suddenly shows up in the middle of your busy days. Apparently she came to take care of you while she was on her summer vacation. This is the story about you and Natsuki one summer
Doesn't this remind you 
of when we were kids?
ألا يذكرك هذا بطفولتنا؟
Erinnert dich das nicht
an unsere Kindheit?
¿No recuerdas cuando éramos niños?
¿No te recuerda a cuando éramos pequeños?
Comme au bon vieux temps !
Non ti ricorda di quando eravamo bambini?
Isso não traz lembranças de
 quando éramos crianças?