Former office lady with an F-cup promiscuous body, Satomi Hibino, who had previously forbidden full internal ejaculation, has now lifted the ban! Despite saying no with words, she accepts internal ejaculation, and eventually becomes a captive of vaginal ejaculation. In the end, she begins to say, "Please use me as a tool to squeeze out sperm," and descends into pleasure, transforming into an onahole dedicated exclusively to internal ejaculation.