C³, also known as C Cube aka Shikyubu or Cube×Cursed×Curious, is a Japanese Action, Harem and Supernatural light novel series written by Hazuki Minase, and illustrated by Sasorigatame. Yachi Haruaki is a high school boy who is naturally resistant to curses. After his father sends him a mysterious black cube, Haruaki awakes to find a nude girl named Fear standing in his kitchen. She’s the human form of the cursed black cube – and an instrument of torture!