This hentai manga follows a pair of twins, a boy and girl, who've always been close. But when they're left alone, their desires turn dark. The girl, in a fit of rebellion, strips and masturbates, her brother watching, his cock growing stiff. They fight, but their bodies betray them. Soon, they're locked in a passionate embrace, the girl riding her brother's cock, their moans filling the room as they indulge in their incestuous fantasies.