Denpa teki na Kanojo(電波的な彼女) is a Japanese light novel series by Kentarō Katayama, with illustrations by Yamato Yamamoto. In 2009, a two-episode[citation needed] OVA adaptation was exclusively bundled with the pre-order editions of Kure-nai DVD volumes 3 and 4. Kure-nai is another anime by the same author. Under the title Denpa Biyori(電波日和), the first story in the series won an honorable mention at the Super Dash Novel Rookie of the Year Awards in 2003. The Japanese term denpa originally referred to radio waves, but in slang usage it refers to people who perceive things sane people can't.