"Touka Gettan" was originally titled "Moonlight Lady II," because it is a spin-off of the 2001 5-episode hentai/pornographic anime entitled, "Kao no nai Tsuki (OVA)" (Moonlight Lady).
The story unfolds in reverse chronological order. Episode 1 is the ending, while episode 26 is the beginning.
The PlayStation 2 version was released on October 1, 2009, with adult content removed.