Keiichi Katakura, but his friends call him Kei-chan. 17 years old. A high school student. He always smiles and hides his sadistic nature, which he can only show to his friends. Kind, cheerful, sporty, caring towards friends. He carries a whip everywhere with him, which he hides behind his back, under his shirt. He may be insecure, but it passes quickly.  He likes older women because, unlike schoolgirls, they are not afraid of his sadistic tendencies. He has short brown hair and green eyes