Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.
CHILDREN'S BOOK
A GENIUS AT CRYPTANALYSIS IS A KIND OF IWASAMA? Ango, who works in an old school building as a "cryptographer" without the school's permission. Hanako, a member of the public morals committee, goes on board to take control of Ango, and a client, who says he received a meaningful letter from his girlfriend, comes to help decipher the code.