One morning, Suzuki Rokumon wakes up to discover a small demon girl, capable of using her hair as appendages, preparing breakfast. In the living room, he encounters another peculiar demon who claims to be his new father. When Rokumon asks where his real father is, the demon informs him that he is in the next room. Needless to say, he is having a rather terrible morning. Thus begins Rokumon's bizarre new life with Lucu and her demons, who, according to her, "want to save the world, and mankind."