While Kazuya desperately tries to get Ruka to promise she won't reveal his secret, she tells him her own.
Oh, I get it.
!فهمت
Oh, verstehe.
¡Ya entendí!
¡Ya lo entiendo!
J’ai compris !
Tu es dégoûtée, en fait…
Ah, ho capito!
Ah, já entendi!
А, тебе обидно, 
что Кадзуя остался со мной?