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. 
involved have died in 
unfortunate accidents.
murieron en circunstancias desafortunadas.
murió en una serie de accidentes.
acabaram morrendo 
por meio de acidentes.