Midori Lesbian High School, which has just been rejected, screking one of his few girlfriends. In the world, right now there are so-called "strange" creatures that appear from nowhere, kill people and disappear again. No one remembers when they began to appear, but the likelihood that someone would kill him, almost the same as the likelihood of death in a car accident. Midori's mother was killed one year ago, and his father is not only rarely present, but also deep in debt. She is attacked by a stranger on the way home, but saved by a mysterious girl who says she is God. Midori calls her Hitsuji (sheep) because of her horns, and takes a girl. They start a website, Hitsujiya, a strange service of battles provided by Hitsuji.