From Visual Novel Database:
Developer and publisher: Dharker Studio (Contain NSFW content)
Released in 9 January 2015.
Steam trading cards consist of 5 artwork, which consist of a CG in the game or artwork in the graphic novel DLC.
Steam profile backgrounds consist of 3 artwork, which are also in the graphic novel DLC.
Consist of 24 CGs.
Game and soundtrack DLC consist of 14 BGM and 2 songs with vocals altogether. The BGM Dorian in-game and in the soundtrack DLC are slightly different.
Theme song Dreamers in Japanese or English on YouTube by undercoverwolf
Initial gameplay video on YouTube by Kuroha Zone
Full gameplay playlist on YouTube by Kuroha Zone
Full review of game:
Steam store page:
Nutaku game page (Contain NSFW content):