C3 Anime

Description
Haruaki Yachi 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. Luckily, Haruaki's friend can transform into a sword.

Plot
The story begins when a high school student named Yachi Haruaki receives a mysterious, super-heavy black cube from his father overseas. That night, Haruaki wakes up to a suspicious noise in the kitchen, and he discovers a fully naked female thief of rice crackers. The girl, Fear, is the first of several surprises that Haruaki receives.