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Miki was having an affair with her son's homeroom teacher because her husband was away from home and her crotch was lonely. However, her son's classmates, who are bad boys, secretly filmed the act, threatened her with the footage, and ended up being raped in front of her son. Then, the bad boys get on their feet and make Miki, who was masturbating in the bathroom, cum all over her body with a milk gun. The escalated bad boys are close relatives including their forbidden sons. Miki also irresistibly shakes her hips and ascends to this!