This is the bonus edition DVD for the PC game "Artemis Blue," obtained as a pre-order bonus for the PC game "Sousei Kitan Aerial." It appears to be a distribution of the previous work "Artemis Blue" by the same brand that created "Sousei Kitan Aerial," with the adult content removed. The operating system requirements are Windows XP/VISTA/7, so please be aware of this before purchasing. (I recall it running fine on a mid-range PC at the time.)