Based on the erotic visual novel developed and published by Light.
The Dies Irae anime project was financed through a crowdfunding campaign ending in July 2015, through which ¥96,560,858 was raised, over three times the target figure of ¥30,000,000.
The script was supervised by the original video game's writer, Takashi Masada.
Episodes 12-17 of Dies Irae, will be released exclusively in web streaming format with no TV broadcast.