Angou Gakuen no Iroha (Cipher Academy)

Angou Gakuen no Iroha manga, Cipher Academy , Iroha from the Crypto Academy. Iroha is an average student newly enrolled in Cipher Academy, a Spartan school where students must crack code after code after code with barely enough time to catch their breath! Then a mysterious person named Kogoe gives Iroha an unusual pair of glasses with a crazy secret behind them!