Original title: Bunny Black
Length: Long (30 - 50 hours)
Year: Japan 2010-07-30, English Patch 2015-04-01
Developer: SofthouseChara
Publishers: SofthouseChara
Language: English
Voice: Japanese
Translation: Seiha Translations

Description:
Dierks is a perverted adventurer entered a labyrinth known as the Maou’s forest and was defeated by the maou himself. But taking pity on him, the maou kindly recruited him as part of this demon army. Given a second chance, Dierks has two goals: to rise in the ranks of the demon army, and to defeat and have sex with those girls who come to attack the maou.

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: