Title: Onmyou Kishi Towako ~Hebigami no Inma Choukyou~
Original title: 陰陽騎士トワコ～蛇神の淫魔調教～
Length: Short (2 - 10 hours)
Year: Japan 2013-08-23, English Patch 2016-07-02
Developer: Black Lilith
Publishers: Black Lilith
Language: English
Voice: Japanese
Translation: Link to project site

Description:
Since ancient times, "diviners" wielded a great summoning magick.
In the age of science they led private lives, but there were some who *d their powers.

Normal men and women were helpless against such criminals.
Thus, the government employed trusted diviners, called "knights", to defend us from those gone rogue.

Important:
1. You need to change locale to Japanese.
http://erogedownload.com/faq/changing-to-japanese-locale-on-windows-7/

2. No need to install.

Screenshots: