After a fight Hayate, Nagi heads to the apartment complex to hang out.  But her “little sister” is the only one home.  This might be Nagi’s chance to find out what Ruri’s real goal is. 
I'm not buying any of that.
No voy a comprar nada de eso.
No voy a comprar nada de eso.
Eu não vou comprar isso.