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...
Well, I guess the fact that they can 
joke about us being a couple
حسنًا، أعتقد أنّ فكرة أنّه بإمكانهما
المزاح حيال كوننا ثنائيًّا
Na ja, wenn sie uns so als Pärchen
darstellen, um uns zu ärgern,
Bueno, que puedan bromear
con lo de que seamos pareja
Bueno, que puedan bromear
con lo de que seamos una parejita
Puisqu’ils nous taquinent
sur le fait d’être un couple,
Beh, se riescono a scherzare
su di noi definendoci due fidanzatini,
Bem, enquanto eles brincam
dizendo que somos um casal,
Ну, раз они в шутку называют нас парой,