Devilman

Miki Makimura is an ordinary high school student who lives with her parents, her younger brother, and Akira Fudo, the son of a family friend who moves in with them after his parents left the country. As the state of the world grows bleaker and bleaker, Miki becomes the one ray of hope that motivates Akira in his battle against the demons. Unfortunately, Miki is savagely murdered by a group of humans out for demon blood, and Akira`s faith in humanity dies with her.