hotaru no haka ( brazillian title represent túmulo do vagalumes ) be a very sad and moving film about the second war in japan and focusing in the difficulty of a brother ( seita ) and a sister ( setsuko ) . after their mother be kill in an air raid and their father be also kill working in japan navy army and seita need to be responsible for his little sister setsuko and a very adorable and sweet little girl . they both go to their aunt house to live and but after know that setsuko and seita be now orphan and their aunt change her behavior and start to be cruel and annoy with them . seita stay tire of that and and decides that be best to him and setsuko to live in a different place and that be a kind of an abandon shelter . have problem to find supply and need to steal to have something to he and setsuko eat and seita and setsuko gradually start to have many health problem . setsuko even go to the doctor and since she be with malnutrition and diarrhea and but in war time and everything get even more difficult . even if you be not an anime ( japanese cartoon ) fan and this movie be worth of watching .