Shigeru and Mariko remarried after leaving their respective past families. Shigeru had a son, Makoto, from his previous marriage, who resented Mariko for breaking up his family and refused to accept her. One day, Makoto rapes Mariko. To avoid being discovered by her husband, she remains silent despite being humiliated—forced to give handjobs under the dinner table and enduring further abuse. Then, her own son, Kenichi, whom she had taken from her former husband, arrives and joins the household. Soon, Mariko is hated by both sons. That hatred eventually turns into violent sexual domination, turning her into their personal sex slave and cumdump.