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. 
What? Maria-san will be 
upset if we buy that.
¿Qué? Maria-san se 
molestará si lo compro.
¿Qué? A Maria no le haría gracia que te lo comprara...
O quê? Se comprar a Maria
 vai ficar irritada de novo.