Early 00's videos from the Attackers company's "Ryubaku" (Dragon Bondage) label. This is the companies "SM focused" label (ドラマ仕立てで"愛"や"信頼"を排除した拷問、折檻を重視したSM専門レーベル。'A label specializing in SM, which emphasizes torture and chastisement without "love" or "trust" in the form of drama.')
This is a continuation of the "Brain Washing / Cyber Madness" series of Ryubaku releases (RBD 046 [sorry, don't have it], 050, 064), continuing on with more women falling to the "M-Forb"
Unusually it is also a sequel of the "Shark" release SHK236, with Miki Tachibana reprising her role as a detective who had been briefly enslaved by an aphrodisiac drug.
Website Description (via Google Translate): "Ritsuko, a psychiatrist, infiltrates the Hatanaka Institute under the guise of a patient, but her identity is revealed and she becomes a prey to M Forb. After that, Louis, who was contacted by Ritsuko, went to the laboratory. There is a brainwashed Ritsuko there, and Louis, who does not notice it, becomes a prey to M Forb ..."
Website Description (via DeepL Translate): "Ritsuko, a psychiatrist, infiltrates the Hatanaka Research Institute by posing as a patient, but her identity is discovered and she falls prey to M-Forb. Later, Rui is contacted by Ritsuko and goes to the institute. Rui receives a call from Ritsuko and goes to the institute, where he finds a brainwashed Ritsuko, who doesn't realize it, and falls prey to M-Forb..."