The first game was released on PC on July 14, 2000 in Japan and was adapted into six anime episodes by the Japanese animation studio Milky Studio a year later. The series is loosely based on events and scenes from the game. The following year, a two-episode prequel was produced, explaining the origins of the first series. Finally, a short second eroge game in the same style as the first one was published in 2008. A live-action movie adaptation was proposed in mid-2011 by American studio Fever Dreams, but appears to no longer be in production.
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