Jun decides to help Shiena with her studies, which drives Naori crazy. Rumi, on the other hand, seems unusually indifferent about it. However, for Naori, it's clear that she needs to keep an eye on them. So, she quickly invites herself along.
That's what happens when 
you wake up that late.
.هذا لأنّك استيقظت في وقت متأخر
Kommt davon, wenn man so spät aufsteht.
Por despertarte tarde.
Eso por despertarte tarde.
Tu t’es levée trop tard.
Questo succede quando ti svegli tardi.
A culpa não é minha que
você acordou tarde.
Тебе надо раньше просыпаться.