Taimanin Shiranui: Inyoku no Dorei Shoufu

This series tells about Shiranui, the mother of Mizuki Yukikaze, who went on a mission and disappeared, since then nothing has been known about her for five years. Time passed, and her daughter Yukikaze, together with Rinko and her brother, came to the solution of the possible location of Shiranui. In the new episode, we will see how she was captured, raped and sexually trained to become a first-class whore.

(Source: ZIZ)