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.
You're making a lot of assumptions.
 I haven't agreed to this.
.لا تستمري بهذا من تلقاء نفسك. لم أوافق على الأمر
Nimm nicht einfach an,
ich würde zustimmen.
No te adelantes,
ni siquiera he aceptado.
No te adelantes, que no he aceptado.
Je me rappelle pas avoir accepté.
Frena un attimo.
Non ho detto di essere d'accordo.
Não vá decidindo por mim.
Eu não concordei.
Я ещё не согласился.