It's Yume and Mizuto's first summer together as stepsiblings. Their parents are unable to return home one night due to a typhoon. Now alone in the house together, trouble arises when Yume spots a certain creepy crawly in her room. On another day, Mizuto accompanies Yume clothes shopping for a swimsuit in preparation for an upcoming family trip to the countryside. It's in situations like these that the two seem to be finding themselves reminiscing about the past more and more...
I can't just erase the fact that we broke up.
That we became stepsiblings.
لا أستطيع محو حقيقة أنّنا انفصلنا ببساطة
.وأنّنا أخوان غير شقيقين الآن
Ich kann nicht ungeschehen machen,
dass wir uns getrennt haben
No puedo ignorar que rompimos
y que ahora somos hermanastros.
No puedo ignorar el que rompimos
y que ahora somos hermanastros.
On ne peut ni oublier
notre précédente relation,
Non posso limitarmi a cancellare il fatto che
ci siamo lasciati. Che siamo diventati fratellastri.
Não posso simplesmente apagar o fato de que
terminamos. Que nos tornamos meios-irmãos.
Я не могу игнорировать 
ни наше расставание,