電撃文庫
A sound novel, with card game attributes, based on the series was released on December 7, 2006 in limited and regular editions by MediaWorks playable on the Nintendo DS. "Allison" is one of the few light novels originally published by MediaWorks that has been made into a sound novel under DS Dengeki Bunko, a section of MediaWorks which produces sound novels playable on the Nintendo DS based from light novels published under MediaWorks' "Dengeki Bunko" publishing label. "Allison" was the first game produced under DS Dengeki Bunko, and the only others include "Baccano!", "Inukami!", and "Iriya no Sora, UFO no Natsu".