The Okamura family's father is a successful designer who is always busy and rarely home on his days off. One day, the eldest son, Kouji, suddenly attacks his mother, Mayuko, attempting to force himself on her. Confused, Mayuko accepts Kouji, but it was a mistake. Kouji's desires are insatiable, growing more intense each day, pulling Mayuko into a quagmire she can't escape. Desperate to do something, Mayuko consults with her second son, Tomofumi…
