C³, also known as C Cube (シーキューブ) or CubexCursedxCurious, is a Japanese light novel series written by Minase Hazuki and illustrated by Sasorigatame about Yachi Haruaki who receives a mysterious black cube from his father.
That night, Haruaki is woken by a noise and finds a nude girl named Fear in his kitchen. Haruaki then has to protect Fear from an organization who wants to destroy her. It was adapted into a manga and anime series at the second half of 2011.
A mysterious black cube, an unknown organization… What could possibly be bound to happen?
This anime has a kind of action/violence that kinda reminds me of Higurashi no Naku Koro ni (review HERE!). Have a look below!