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. 
So I've been praying to the stars: 
"Do something about this already!"
He estado rezándole a las estrellas: 
"¡hagan algo al respecto de una buena vez!".
He estado rogando a las estrellas que hicieran algo de una vez.
Por isso, pedi para as estrelas