C3: Cube x Cursed x Curious  

C Cube, C^3, C3, C3 Anime, C³ Cube x Cursed x Curious, cxcxc, سی به توان 3

The story you're referring to is a love, action, and comedy series written by Minase Hazuki. It follows the adventures of Yachi Haruaki, a high school student who has an innate resistance to curses. One day, his father sends him a mysterious black cube that turns out to be cursed. When he awakens, he finds a nude girl named Fear standing in his kitchen. She's the human form of the cursed black cube and is used as an instrument of torture. Despite this, she fights alongside Haruaki to defeat other cursed instruments and their owners.