Koi Kaze (Japanese: 恋風, lit. "Love Wind") is a Japanese manga series written and illustrated by Motoi Yoshida. It premiered in the September 2001 issue of Evening and ran for 35 chapters until its conclusion in the October 2004 issue. The individual chapters were collected and published in five tankōbon volumes by Kodansha. The series tells of the taboo love affair that develops between 27-year-old Koshiro, and his teenage 15-year-old younger sister, Nanoka.The chapters were adapted as a 13-episode anime television series by A.C.G.T. Directed by Takahiro Omori, the episodes premiered on TV Asahi on April 1, 2004 and ran until June 17, 2004. Only twelve episodes of the series aired, with the remaining episode streamed online and later included in both DVD releases and when the series aired in reruns as the eighth episode. The anime series was licensed for release in North American by Geneon Entertainment, which released three DVD volumes in 2005.