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.
Don't think for a second I'll concede this,
 my dear little sister.
لا تظنّي ولو للحظة أنّني سأستسلم 
.لهذا يا أختي الصّغيرة
Glaub bloß nicht,
dass ich Gnade walten lasse,
No creas que pienso ceder,
querida hermanita.
No creas que pienso ceder,
querida hermanita.
Crois pas que je vais être sympa
parce qu’on est dans le même bateau.
Guarda che nemmeno io ho intenzione 
di sorvolare, mia cara sorellina.
Não pense que vou pegar leve porque
acabamos em um empate, irmãzinha.
Даже не надейся, что я согласен на ничью,
моя младшая сестрёнка.