Her biological mother ran away with her lover, and the girl was left behind by a man who had no blood relationship or love for her daughter. After that, the girl is trained in sexual techniques such as masturbation to make the man happy, and becomes a sexual processing tool for the scum brought by the man. They were restrained with their legs spread open in an M shape, and the scum's sperm was poured into their unused pink genitals. While being teased by the girl, she endured the overwhelming pleasure...