渡辺明夫
is a 27-minute Japanese anime directed by Akio Watanabe and Toshikazu Matsubara, and produced by CoMix Wave Films as an original net animation. It was made available online on June 21, 2006, and then was released on DVD in Japan on August 3, 2006. It was screened at the Waterloo Festival on November 16, 2006. The OVA was released on DVD along with the "Coffee Samurai" OVA on May 10, 2011 by Section 23 Films. Anime Network shows both "Hoshizora Kiseki" and "Coffee Samurai".