A pure, long-haired, lolita-type girl is kept as a sexual pet and used for sexual relief in various locations such as offices, homes, and part-time job sites. Mari Kobayashi, innocent and inexperienced in sex, captivates with her genuine purity. As she is trained to serve as a perverted sex slave, elements like humiliation and restraint are incorporated into her conditioning. Throughout this process, her innocent heart and untainted appearance become even more pronounced.