C³ - Cube×Cursed×Curious

Japanese Title: C³ -シーキューブ-

Chinese Title: 魔幻三次方

Plot
The story begins with high-school student Yachi Haruaki naturally resistant to curses. His father, Honatsu, sends him cursed instruments called "Worse" to try to break this. One day, Haruaki receives a mysterious package, a super-heavy black cube from his father overseas. That night, Haruaki wakes to a suspicious noise in the kitchen and discovers a cute-looking stark-naked female stealing rice crackers. After the embarrassing moment, the girl presents herself. Her name is Fear (pronounced "Fia" in Japanese), and she is the first of several surprises that Haruaki is to receive. She is the human form of the black cube, an instrument of torture called "Fear in Cube". Haruaki and the girl "Fear" fight together against other Worse instruments and their owners using Fear's 32 mechanisms of torture.

OVA: Rinkan Gakkou Confusion!
Japanese Title: 林間学校こんふゅーじょん!

English Title: The Outdoor School Confusion

Airdate: April 25, 2012

All of the main characters go on a school trip into the mountains. Upon arriving though the principal informs Fear, and Haruaki via a video recording that the true intention of the trip as there are cursed monsters lurking about. The trip goes by without a problem until Fear hears someone scream, and large impressions in the ground along with slime is found but nobody is reported to be missing or scared of anything unusual. Haruaki is then later kidnapped, and taken to an unusual cave that the principal had mentioned in his recording. Fear is able to overcome her fear of spiders, and rescue Haruaki whom is tied up. The whole thing ends up being a prank by the principal with Kuroe, and Sovereignty in on it as helpers. The intention was to strengthen the bonds of the main characters, and cure Fear of her fear of spiders. Confident that spiders are no match for her now, she is soon terrified again by a spider that appears behind her when Ueno asks her to turn around.