Aura: Koga Maryuin's Last War

is a Japanese romantic comedy light novel written by Romeo Tanaka, with illustrations by Mebae. It was published on July 18, 2008 by Shogakukan under their Gagaga Bunko imprint. A manga adaptation by Kōichirō Hoshino was serialized between the April 2012 and May 2013 issues of Shogakukan's Shōnen Sunday Super. An anime film by AIC ASTA premiered on April 13, 2013.

Plot
Ichiro Sato formerly suffered from a case of youthful delusions of fantasy and grandeur, which caused him to be bullied throughout middle school. Now in high school, he strives to be a normal student. Unfortunately, his teacher has entrusted him with the care of a girl with a similar case of delusions.