Early 00's videos from the Attackers company's "Ryubaku" (Dragon Bondage) label. This is the companies "SM focused" label specializing in SM, which emphasizes torture and chastisement without "love" or "trust" in the form of drama.')
Website Description (via Google Translate): "Private detective Ai Shiroshima (Sawaki) visits a training facility disguised as a villa of Professor Hatanaka (Hayamizu) to investigate the disappeared female college student, but on the contrary, her identity is discovered and she becomes a prey to Mforb. She was gradually trained as an M slave girl."
Website Description (via DeepL Translate): "Private detective Ai Johjima (Sawaki) visits a training facility disguised as Professor Hatanaka's (Hayami) villa to investigate the disappearance of a female college student, but she is discovered and falls prey to Emphobe. She is gradually trained as an M-slave."
Scene 1: Ai is investigating the disappearance of a female student and visits the villa of her professor. She gets drugged and wakes to find herself bound to a chair with a brain control helmet on. The professors's slaves masturbate in front of her. Non-nude, masturbation
Scene 2: Waking up nude after being brain zapped, Ai is bound and sexually teased. Bondage, groping, cunnilingus, fingering, spanking, whipping
Scene 3: Under the influence of the helmet, Ai has a surreal dream and attempts to escape, but cannot. Nude
Scene 4: Ai is humiliated by one of the professors male slaves. Groping, cunnilingus, fingering, bj, missionary, doggy, creampie
Scene 5: Another dream sequence Nude
Scene 6: Ai comes to bound with a vibrator in her pussy. One of the professors' female slaves comes in and fucks her. Bondage, vibrator, fingering, strap-on, bj, missionary, cowgirl, doggy, whipping
Scene 7: Another dream sequence, but now we see that in the waking world, Ai is on the chair with the helmet masturbating Masturbation
Scene 8: Now a willing slave, Ai pleasures the professor Bondage, whipping, bj, missionary, facial