It's nighttime at the Irido residence. Yume has somehow found herself with Mizuto's boxers in her possession. If Mizuto were to find out, it would almost certainly mean she would have to face the punishment of admitting to being the younger sibling. Hoping to avoid this outcome, Yume waits for Mizuto to fall asleep before heading to the bathroom to return his underwear to the laundry basket. But who does she pass in the hallway, but a bewildered Mizuto, mouth agape, with Yume's very own bra dangling from his grasp.
Hang on! When we're sisters, 
we'll be around each other 365 days a year.
،مهلاً! عندما نصير أختين
.سنكون معًا طوال أيّام السّنة
Un attimo! Se fossimo sorelle,
staremmo insieme 365 giorni all'anno.
É mesmo! Quando formos irmãs, estaremos
perto uma da outra 365 dias por ano.
Точно! Когда мы станем сёстрами,
то будем вместе круглый год.