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...
All that combined gave it 
an indescribable charm.
.وقد أعطته كلّ هذه الأشياء مجتمعة سحرًا لا يوصف
Das alles zusammen gab ihm
einen unbeschreiblichen Charme.
Combinándolo todo,
le da un encanto único.
Combinándolo todo,
le da un encanto único.
Tout ça apporte
un certain charme indescriptible.
Tutti questi elementi insieme
gli hanno dato un fascino indescrivibile.
Tudo isso combinado deu
um charme indescritível.
Эта смесь и придала фильму
непередаваемое очарование.