Asura Cryin' (4) Himitsu no Tenkousei no Himitsu

is the fourth volume of the Asura Cryin' light novel series, written by Gakuto Mikumo and Illustrated by Watanuki Nao. It was released under the Dengeki Bunko Imprint in June 2006.

Synopsis
A theft case occurred in Rakutaka. The criminal is a super-skilled underwear thief with the nickname "Underwear Man (Hameln)". The scale of damage is hundreds of underwear. At the command of Shuri, who is angry, Tomoharu and his friends move to arrest the criminal. At that time, an international student with a beautiful blonde girl came to Tomoharu's class. Her name is Ania Fortuna. She looks like a 10-year-old child, but she is actually a genius girl, Tomoharu and others who are confused by Ania. Her true identity was the "lucky" demon called by the science madness, and the one who knew the secret of the genie Asura (Asura Machina). At that time, the Students' Union was chasing "devil hunting" criminals who indiscriminately attacked the devil. The criminal who cannot be defeated even by the GD performers is a contraindication called a genie taboo. Will Tomoharu protect Kanade and Ania from a strong enemy with overwhelming fighting ability?!?

(source: Bookwalker JP - Translated)

Characters

 * Tomoharu Natsume
 * Misao Minakami
 * Aine Shizuma
 * Kanade Takatsuki
 * Reishirou Saeki
 * Ania Fortuna Someshuru Miku Crowsenbruhi
 * Takaya Kagakagari