What is it with us? Seven years have passed since we became like this in this relationship. It's a secret between the two of us that we can never tell anyone, but who would have thought it would end like this? In the midst of adolescence, his uncontrollable sexual urges reach out to his sister Emma... A story of sex between a brother and sister who crossed a boundary that should never have been crossed. Day after day, he makes his sister suck his cock... He can't be satisfied with just letting her suck it, and they cross the line. The sister accepts. The brother's sexual desire accelerates. Seven years of this fleeting but heartbreaking relationship between brother and sister.