- Series: Akuma No Riddle: Riddle Story of Devil
- Paperback: 164 pages
- Publisher: Seven Seas (January 26, 2016)
- Language: English
- ISBN-10: 1626922314
- ISBN-13: 978-1626922310
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Haru and Tokaku are members of the “Black Class” and there’s only one way to graduate – kill the rest of the class. Tokaku vows to protect Haru for her own reasons, but can either of them survive, much less both?