Mahiro Tadai celebrates the seventh anniversary of her debut. Worried that people might be put off if she admits how strong her sex drive is and how often she masturbates on days off, Mahi finally reveals her filthy true nature. She follows her instincts in nonstop group sex and turns into an insatiable sex monster, squirting so endlessly during penetration that cleanup takes three hours. Pushed beyond her limits, she lets out moans no one has heard from her before, then ends covered in a final pack of semen.