C3

From the light novel series written by Minase Hazuki, comes a story of love, action, and comedy. 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! Utilizing her special abilities, Fear fights alongside Haruaki to defeat other cursed instruments and their owners.<br><br> (Source: FUNimation)

AnimeLok is the best site to watch C3 SUB online, or you can even watch C3 DUB in HD quality. You can also find Sunrise anime on AnimeLok website.