The Inoue family lives an ordinary life that seems to be anywhere, but their wife, Ayako, and their only son, Tetsuro, share a secret that no one can tell. The secret ... the fact that it has fallen into an incestuous relationship. Although they say to cut off, their bodies attract each other and cannot be separated. On the contrary, I am addicted to the pleasure of harrowing at the close distance of my husband who should not be caught the most. And even today, sexual intercourse without voice becomes more intense ...