* Based on the erotic manga by Yuzuki N'. The first story involves a male student who is all of a sudden propositioned sex by the girl, shiiba-san, he sits next to. She teases him with her experienced body and sexual techniques. Then we go to another story involving a sister who finds her brothers porn collection. After seeing such ecchi, she becomes aroused and decides to pleasure her onii-chan with some mouth service. Finally we make a comeback to the original story where we find out the secret of shiiba-san’s sexual knowledge and why she chooses to use such knowledge on this lucky student.