Artist's website: http://homepage3.nifty.com/tsukasa_kaikoh/index.htm

"Rank A agent Saki Kusanagi of the WCPO Female Search Officials.
Kusanagi has alone infiltrated Rozen Kreuz, an evil organization which plans to lead the world to ruin.
Tragically, Kusanagi has been imprisoned, and she can now expect nothing but violation while being harshly tied up.
An illustration collection featuring the original character Saki Kusanagi, a female spy.
Restrained carefully using ropes or other ways of restraint, her body is violated in every single way possible."

https://www.dlsite.com/maniax/work/=/product_id/RJ037278.html

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