
Yachi Haruaki is a high school boy. He is naturally resistant to curse and his father Honatsu sends him cursed instruments called "Worse" to let him break the curse. One day, Haruaki receives a black cube from Honatsu. At the night, he encounters a naked silver haired girl stealing rice crackers. 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.
C³ is a Japanese novel of 2,214,222 characters, with 29,090 unique words and 2,751 different kanji. Its difficulty rating on Jiten is hard, 3.4 out of 5. The full vocabulary list ranks all 29,090 words by how often they appear, and you can study them on Jiten or download them as an Anki deck.
Here are some of the words that appear most often in this media, as well as a sample of its rarer vocabulary.