A sadistic, pedophilic older brother plays tricks on his submissive younger sister, Kyouka, and gives her a hard-core sex education! In order to live up to her beloved older brother's expectations, Kyouka studies sex hard! Kyouka is a masochistic girl who is growing more and more erotic! Before she knew it, she had become a masochistic girl who gets excited when her older brother spanks her on the butt and gives her a deep throat blowjob...