Miharu was taken in and raised by her stepfather since elementary school after being orphaned. He initiated a sexual relationship with her at age 16 and has continued to dominate her sexually ever since. Even after Miharu reached adulthood, her stepfather refused to let her go, arranging her marriage to one of his subordinates to maintain ownership over her—continuing to subject her to repeated acts of rape and humiliation. Now trapped as his sex slave and cumdump, she remains under his complete control, enduring his perverse desires time and again, especially in the cowgirl position, despite being a married woman with big tits.