Ruka is hellbent on knowing the full story behind Kazuya and Chizuru's relationship, and once she does she decides to take action.
If you're not, please walk away 
like a proper rental girlfriend.
إذا لم تكوني كذلك، فلتبتعدي رجاءً
كما يليق بحبيبة مُستأجرة
Wenn du es nicht ernst mit ihm meinst,
halte dich von ihm fern, wie Mietfreundinnen das tun!
Si tu l’aimes pas, renonce à lui
comme une vraie professionnelle.
Se tu non fai sul serio, fatti indietro.
Se você não leva, afaste-se dele, como
uma namorada de aluguel deve fazer.