A professor who lost his wife dedicates himself to developing a humanoid masturbation device equipped with AI resembling his late spouse. During the final experiment, the professor is restrained in a M-shaped position, oiled up and having his nipples groped. He is tormented by numerous vibrators and electric stimulators, writhing in pleasure beyond human limits. This is followed by deep-throat penetration with dildos, finger sucking, and even double deep-throating involving both the assistant and the professor's penis. As the sessions progress, the humanoid masturbator grows increasingly erotic, mastering advanced techniques like consecutive deep-throating and push-up deep-throating. Ultimately, the experiment reaches its final stage: a creampie threesome, culminating in an intense climax.