When the girl sees the demon king, she realizes that he's not a human, but a demon. She's shocked that no one else has realized that she can see him. The girl tells the girl that there once was a demon king who ruled the world. The humans called him the "demon king" because he looked like a demon, but the humans feared him and called him "the demon king." The girl asks the girl what she's talking about, and the girl tells her that she is the only person in the world who can see her like that. She says that she doesn't expect anyone to be able to see what she sees, but that she was surprised to find that someone could see her on her first day. She explains that there used to be a king who was immortal and ruled over all demons. He was called the "Demon King." The humans feared that the king looked like him, so they called him that. He's back.