After teaming up with Sekai Project to help release some of their future visual novels on Steam, it seems that Lupiesoft’s Reject Demon Toko made it past the selection process and dated to be released on the game juggernaut by April 7th. Lupiesoft also has its other project, The Menagerie pending release by Mangagamer. You can find The Reject Demon Toko’s Steam page (along with promotional video) HERE and Lupiesoft’s official website HERE.
UPDATE 1 (4/23/2015): For the sake of quality, the release window has been pushed back to an unknown date. Will provide more information in the future as it becomes available.